Move ceed* files to 'inteface' directory, comment cleanup

Further CPU backend commenting and cleaning

Clean up and tighten Opt and Ref backends

[OCCA] Qfunction data dim is set from basis

[OCCA] Initialized restriction kernels to occaUndefined

[OCCA] Attempting to 'turn on' CEED_EVAL_GRAD for output

Add/Fix switch in Opt BasisApply

Add improvements from jed/opt-vectorize

8x vectorization for Opt

Fix typo in tmpl backend init

Fix dangling bracket in MAGMA

Comment update, remove unneeded guard on VectorDestroy

Create RestrictionCreateIdentity, convert examples, simplify OperaterApply

Merge branch 'batched-basis-apply' [PR #110]

* batched-basis-apply:
Style and documentation updates
Error message for BasisApply when nelem != 1
Add nelem argument to BasisApply

Style and documentation updates

Merge branch 'RestrictionBatch' [PR #106]

* RestrictionBatch:
Clean up/reorder blocked loop
Update loops
Style
More loop tightening
Tighten loop structure for permute and pad
Document nc

Merge branch 'RestrictionBatch' [PR #106]

* RestrictionBatch:
Clean up/reorder blocked loop
Update loops
Style
More loop tightening
Tighten loop structure for permute and pad
Document ncomp (description/name ndof is incorrect)
Documentation update
Loop and style updates
Tap exception for backends that don't yet support Blocked restriction
Added RestrictionCreateBlocked, only implimented in Ref, and t06

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Clean up/reorder blocked loop

Update loops

Style

More loop tightening

Loop and style updates

Error message for BasisApply when nelem != 1

Add nelem argument to BasisApply

Added RestrictionCreateBlocked, only implimented in Ref, and t06

Remove !! in Operator setup