Delete the OCCA_LIBS variable from the mfem examples building rule.

Some small tweaks and improvements in the MFEM and PETSc examples.

Merge branch 'master' into nek_gpu

Merge branch 'unify-examples-dev' [PR #52]

* unify-examples-dev:
examples/petsc: work around offensive astyle formatting
Several improvements/unification between the libCEED examples

Several small updates in the Nek scripts and documentations.

With these, I can run all libCEED examples with the /gpu/occa spec on my Linux
box!!

Merge branch 'master' into nek_gpu

Several improvements/unification between the libCEED examples

- All examples except Nek support '-ceed' now as command-line parameter for the Ceed spec
- The MFEM and PETSc examples were renamed to

Several improvements/unification between the libCEED examples

- All examples except Nek support '-ceed' now as command-line parameter for the Ceed spec
- The MFEM and PETSc examples were renamed to bp?
- The libceed example (ex1-volume-annulus) was moved to examples/ceed/ex1
- For clarity, the libCEED portion of the MFEM examples were moved to header files
- Documentation + sample runs were added

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Merge branch 'master' into nek5k_updates

Merge branch 'occa-dev' [PR #42]

* occa-dev: (70 commits)
Makefile: explicitly use bash because shell script does not have conforming shebang
make okl-cache: simplify caching call and fix to fin

Merge branch 'occa-dev' [PR #42]

* occa-dev: (70 commits)
Makefile: explicitly use bash because shell script does not have conforming shebang
make okl-cache: simplify caching call and fix to find OCCA executable
Cache OCCA kernels in PETSc examples makefile
[occa] PETSc example with ctx inout, qfdatasize & offsets
[occa] device from ressource, OpenCL TILE size tied to 1
[occa] fixed /ocl/occa
Couple more OKL kernel fixes in example Makefiles
Comment-out the restrict kernels using atomicAdd(double), so we can build the OCCA backends on GPU cards with lower SMs.
[occa] occaPropertiesSet to match new C wrapper API
[occa] dbg macros + ceed argument moved down to occa backend
[occa] Makefile targets comments, occa source debug cleanup
[test] t30 output removed, added V vector 0.0 check
[occa] examples Makefile occa cache
[occa] basis & restrict stat logic to test out of source examples
[occa] pushing backends/occa/*.okl to install prefix/lib/okl and use them if needed
[occa] style
[occa] CeedDebug output when CEED_DEBUG or DBG are non null
[occa] Updated to 1.0 C API
[occa] make style
[occa] cleanup + OCL but tests that use ex1-volume-annulus.okl
...

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Couple more OKL kernel fixes in example Makefiles

Comment-out the restrict kernels using atomicAdd(double), so we can build the
OCCA backends on GPU cards with lower SMs.

Removed C11 _Generic macro in dbg/cdbg macros in ceed-occa.h.

Fixed OKL kern

Comment-out the restrict kernels using atomicAdd(double), so we can build the
OCCA backends on GPU cards with lower SMs.

Removed C11 _Generic macro in dbg/cdbg macros in ceed-occa.h.

Fixed OKL kernel caching in Makefile in examples/mfem.

Make style.

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[occa] examples Makefile occa cache

[occa] cleanup, MFEM ex1 and OKL file lookup with '.'

[occa] WIP MFEM ex1

Merge branch 'master' into fortran_interface

Merge branch 'jed/make-install' [PR #32]

* jed/make-install:
make install: document in README
make install: avoid non-portable GNU install options
make: add install target
Switch to include/

Merge branch 'jed/make-install' [PR #32]

* jed/make-install:
make install: document in README
make install: avoid non-portable GNU install options
make: add install target
Switch to include/ceed.h and lib/libceed.so directory structure

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Switch to include/ceed.h and lib/libceed.so directory structure

This gives the source directory a compatible directory layout with
the install directory, thus enabling a user to use either.

Merge branch 'master' into fortran_interface

Merge branch 'mfem-diff-example' [PR #20]

CEED_REQUEST_NULL was removed in 'master'. Use in this branch is
replaced by CEED_REQUEST_ORDERED.

* mfem-diff-example:
In the mfem examples:
Add an M

Merge branch 'mfem-diff-example' [PR #20]

CEED_REQUEST_NULL was removed in 'master'. Use in this branch is
replaced by CEED_REQUEST_ORDERED.

* mfem-diff-example:
In the mfem examples:
Add an MFEM diffusion example, ex3.cpp
Add support for BasisApply with CEED_EVAL_GRAD + CEED_TRANSPOSE modes

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Add an MFEM diffusion example, ex3.cpp

Merge pull request #11 from CEED/occa-backend

OCCA backend [occa-backend]

Fix the MFEM example build plus a few other fixes and tweaks in the
OCCA backend.

Merge branch 'master' into occa-backend

Merge branch 'mfem-example'

* mfem-example:
Fix tests that were failing due to the API changes.
Slight adjustments in mfem/ex1
A first working version of the MFEM example.
Add support for mu

Merge branch 'mfem-example'

* mfem-example:
Fix tests that were failing due to the API changes.
Slight adjustments in mfem/ex1
A first working version of the MFEM example.
Add support for multi-component fields (such as mesh coordinates) in CeedElemRestrictionApply, including implementation in the reference backend.
First draft of MFEM example.

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First draft of MFEM example.