Optimization of weight kernel and dynamic allocation of shared memory.

- First optimization of weight kernel, kernels are now coalesce but
might not be fully using SMs (need to batch elements per

Optimization of weight kernel and dynamic allocation of shared memory.

- First optimization of weight kernel, kernels are now coalesce but
might not be fully using SMs (need to batch elements per block)
- Switch to dynamic shared memory allocation in order to batch elements
for interpolation and gradient in cuda-shared backend.
- Add GetPreferedMemoryType for cuda-reg and cuda-shared backends.
(Can be removed in the future with delegation of this function)

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Optimization of cuda-reg restriction.

Start the optimization of the Cuda restriction operator.

Makefile: distclean removes config.mk; NVCC ?=

Added append option to tee for CC, FC, and NVCC

Merge pull request #268 from CEED/petsc-bp-bugfix

PETSc BP4/6 Typo: Error -> Error3

Typo: Error -> Error3

make configure: cache user variables in config.mk

Add -include directive to Makefile to allow import of custom build configurations

Merge pull request #264 from CEED/get-memtype-fix

Add delegation to CeedGetPreferedMemType

Add delegation to CeedGetPreferedMemType

Merge pull request #263 from CEED/valeria/update-postprocessingscripts

Update postprocessing scripts

Merge pull request #262 from CEED/occa-clang-tidy

OCCA Backend clang-tidy fixes

OCCA backend update note

Travis: clang-tidy only on linux

NOLINT for OCCA tensor contract false positive

Re-add test_required_examples for proper title and pdf file name

Update postprocessing scripts

OCCA Backend clang-tidy fixes

Add PETSc BP2, BP4, BP5, BP6 (#243)

* Add PETSc BP2, BP4, BP5, BP6

* Documentation update

* Update make benchmark

* Minor changes

* Add PETSc bpData structure

* Update make benchmarks

Add PETSc BP2, BP4, BP5, BP6 (#243)

* Add PETSc BP2, BP4, BP5, BP6

* Documentation update

* Update make benchmark

* Minor changes

* Add PETSc bpData structure

* Update make benchmarks

* Benchmark - use default qextra

* Documentation fix

* Clean up PETSc bps.c, add benchmarking first run

* Drop -ksp_max_it from benchmarkscript

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Merge pull request #261 from CEED/valeria/update-gitignore

Update top level .gitignore

Update top level .gitignore

Merge pull request #239 from CEED/decorator

Add delegates for specific objects

Merge pull request #240 from valeriabarra/rescaled-ns-example

Rescaled ns example

README: Drop tmpl backend from list