Fill up more for the magmabackend. make test pass for magma

[occa] cleanup

[test] All 315 tests successful: C, Fortran @ CPU, GPU, OpenCL, OpenMP

[okl] pointer arith & cleanup

[okl] local pointers arith

[occa] WIP qfunctions t20, t30 & ex1-volume-annulus examples

[occa] wip qfunction t30, ex1-volume-annulus

[occa] qfunction t20 cpu + gpu

[occa] CeedQFunctionApply_Occa kernel wip

[occa] documentation

[occa] fsanitize

starting to add magma backend; just putting the infrastructure for now ...

[occa] QFunction from OKL files

[occa] Remove unnecessary atomicAdds in the OKL kernels

[OpenMP] Add omp backend for the tests

[make] tst, prv targets

[debug] CEED_DEBUG => NDEBUG

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

show more ...

Add support for BasisApply with CEED_EVAL_GRAD + CEED_TRANSPOSE modes

OCCA: Fix logic for raising an error when falling back to Serial

Fix the size of temporary arrays in CeedBasisApply_*

Merge branch 'occa-backend' of github.com:CEED/libCEED into occa-backend

[occa] kRestrict[345] fix to avoid race condition, thx David

make style

[occa] /omp/occa mode