Makefile: AVX test cannot match -mno-avx

Merge branch 'yohann/cuda-non-tensor' [PR #249]

* yohann/cuda-non-tensor:
ceed-cuda: resolve -Wsign-compare for CUresult (unsigned enum) in CeedError
make style.
namespace cuda backends functi

Merge branch 'yohann/cuda-non-tensor' [PR #249]

* yohann/cuda-non-tensor:
ceed-cuda: resolve -Wsign-compare for CUresult (unsigned enum) in CeedError
make style.
namespace cuda backends functions.
Minor: styling
Add CUDA_LIB_DIR_STUBS for systems that don't have CUDA drivers installed
make style
Remove useless function declaration.
Add a reference non-tensor BasisApply for cuda backends.

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ceed-cuda: resolve -Wsign-compare for CUresult (unsigned enum) in CeedError

make style.

namespace cuda backends functions.

Minor: styling

Add CUDA_LIB_DIR_STUBS for systems that don't have CUDA drivers installed

Merge pull request #282 from CEED/bp5-bp6-fix

Update qextra to reflect BP paper

Convert BP5 BP6 to GLL

Update qextra to reflect BP paper

Merge pull request #274 from CEED/underintegrate-basis-fix

Fix Underinterpolation in /cpu/self Backends

Merge pull request #278 from CEED/petsc-bp-docfix

PETSc BP Docfix

Update Benchmark documentation

Update README for PETSc BPs

Improve petsc-bps benchmark output (#266)

* Improve petsc-bps benchmark output

Mesh Order -> Number of 1D Basis Nodes

* Update postprocess-base.py for new output

* Fix line break in plot ti

Improve petsc-bps benchmark output (#266)

* Improve petsc-bps benchmark output

Mesh Order -> Number of 1D Basis Nodes

* Update postprocess-base.py for new output

* Fix line break in plot title and pdf file name

* Shorten plot title

* Fix legend polynomial order p

* Update postprocessing scripts to use Pandas

* Benchmarks: plot title, tasks->ranks

* Update title with latex \times symbol and icrease font size in title, legend, and axes

* Postprocess script title, num_proc_node instead of num_proc

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Update 'make junit'

Fix underinterpolation mode for /cpu/self backends

Merge pull request #267 from CEED/valeria/Makefile-include

Add -include directive to Makefile

Minor documentation fix in examples/README.md

Remove dead or unnecessary code.

Remove dead code. Cuda-reg restriction optimization.

Optimization of 3D kernels for cuda-shared backend.

Optimization of 1D kernels for cuda-shared backend.

Optimization of 2D kernels for cuda-shared backend.

Minor bug fix