fixed issues with grid spacings

new gridtype: "discrete". This samples the grid points and does not set the probability.

add a fix to distinguish between centred and edge grids when computing number of points over which we should loop and phasevols

also added a warning in the const_dt spacing function to catch the edge case where tmax or max_evolution_time are shorter than the first timestep, which would lead to an empty interpolation table

Decided the chunks / ensemble results per thread will be written as jsons and not as raw strings. Changed tests accordingly

Fixing tests that failed. Added a function to filter dicts based on value instead of key. Added M&S data to grid options rather than custom options

remove deprecated resolution setting

own source files

add option "save_ensemble_chunks" to make sure the ensemble chunks are saved : I am chasing up a grid that completely froze (and gave segfaults) ...

add modulo cost in tpr calculation: if modulo is 10, we underestimate the cost by ~ a factor 10, so we should multiply by the modulo

also prevented the Moecache from being freed on grid exit: we can have nested grid objects, and in that case it is required to remain

attempted to harmoize the Moe and di Stefano (2017) variable names so they all use Moe2017 (or MOE2017)

added options to the Moe loader so we can change the JSON data and reload it after clearing the cache

the period distribution renormalization now gets the low and high limits from the loaded data

update_dicts() now copies the type of dict_1 for the new dict, rather than using OrderedDict (maybe merge_dicts should do this too?)

I've fixed the _boxed formatting to strip ANSI codes when calculating string lengths (so you can use ANSI colours properly)

changed the colours for the "failed systems" warning so it's absolutely obvious

wrapped the JSON ensemble output in a write_ensemble() function which automatically gzips or bzips depending on the filename extension (or this can be explictly set in grid_options['compress_ensemble'] ).

make gridcode filename blue

cleaned up some of the verbosity to be more like binary_grid and less annoying