Changes

New fill_holes methods (#1262)

* Adding little code bits to help explore fill_holes. This is just a diagnostic playground

* Improvements

* Maybe better algorithm?

* Improvements to the new fill holes

* Nice progress

* Small tweaks

* Mainly adding gptl option for cmake and new run_timestep_tests.py

* Making namelist input for fill type, and adding ANOTHER new filler that should be completely parallelizable, but right now large hole groups steal too much from nearby points and it looks kinda bad.

* Big improvements, new algorithm is good now

* Small updates

* Making new fill_holes_type flag for clubb_config_flags

* New hybrid filler

* Small fixes

* Changes, mainly for performance, also adding -gptl option to compile.py to make it use the gptl library

* Bunch of things

* Updates

* small fix

* Various cleanup and comments

* Small improvement to p_atomic

* Updates for speed mainly

* Small improvement to p_atomic

* Potential improvement to p_atomic

* Updates for speed mainly

* Updates to make G_unit fill holes test

* Improving new tests and making widening_windows and smart_window work in flipped grid mode

* All methods passing G_unit test, still need a little cleanup

* Slight comments update

* Cleanup

* Adding named constants for fill type

* Uncommentting source checks after compile

* Adding new file to old compile method

* Small fixes

* Small fixes

* Mainly comments

* Making G_unit test use the new python script and compiler method. Small bug fix too

* Little fixes

Making compatible with new version of clubb (#167)

Small bug fix in fill_holes_parallel on GPU