rename elem restriction kernel file

move element restriction kernels to common folder

update documentation for HIP MAGMA backends

resolve merge conflicts for v0.7 release

Tests - delete stray okl file (#640)

libCEED-0.7

Python: update wheel script

Make - update make info with better backend name display (#639)

Make - add cpp files to code coverage (#638)

Jeremy/py debugging (#637)

* Ceed - only store error with parent

* Python - assert state is not in write status

* Vector - add reader check to destructor

* make style

* remove debugging

Jeremy/py debugging (#637)

* Ceed - only store error with parent

* Python - assert state is not in write status

* Vector - add reader check to destructor

* make style

* remove debugging assertion

* Python - minor documentation correctness

* Python - hold reference to data array for USE_POINTER to prevent gc

* Python - hold reference to data array for USE_POINTER to prevent gc for restriction and context

* Python - use None object for initial ref back to ceed objects

* Python - add USE_POINTER to imports as needed

* Junit - update valid error message for writable access lock

* Python - change exception raised test to help gc

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Merge pull request #634 from CEED/jeremy/occa-order

OCCA - update backend resource names to match other GPU backends

update backend priority numbers

minor - update documentation on memcheck backend

README - make backend table clearer, use /gpu/cuda over /gpu/occa as default example gpu backend

MAGMA - update backend names to new convention

OCCA - update backend resource names to match conventions

Merge pull request #636 from CEED/jed/python-debugging

Jed/python debugging

Python: add Ceed on_error kwarg for "abort" or "store" (default)

This is mainly intended for debugging inter-language issues.

Python: add vector._state() for help debugging reference counting mismatches

vector: fix typo in man page

swap ordering in magma backend names

add cuda and hip tags to MAGMA backends

Merge pull request #628 from CEED/jeremy/ceed-hash

Make - install hashing headers, used in MFEM

Hash - update ceed-khash header guard

Make - install hashing headers, used in MFEM