[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 from OKL files

Reuse SIZE if it exists

Fix a typo

make clean: Clean nek5000/examples directory

Nek: generate SIZE from SIZE.in and makenek so it is not versioned

Add .gitignore file

Remove lines added by makenek

Use makenek from the Nek5000 path

Nek5000 example: add support for NEK5K_DIR and edit README

Update README

Update run-nek-example script

Comment out exitti call

Add a README for Nek5000 examples

Enumerate QFunctionFortranStub call with arguments

Replace %val(0) by ceed_null

Update Nek5000 example: working now !!!

Update scripts: generate-boxes, make-nek-examples

run-nek-example.sh

Update Nek5000 example

Add a batch script to run Nek5000 example

Update Nek5000 example

and remove some whitespaces.

Merge branch 'master' into fortran_interface