Rename `chunk_size` to `chunksize` for consistency with pytables
Add pytables storage and load functions to `NumericPSF `
Storage: add `open()` method to reopen a closed file.
PSF storage: correct use of pytables API
Storage: rename `params` and `parameters` to `nparams` (numeric-parameters)
Store the PSF in pytables
Storage: fix saving of params in emission arrays
Update .gitignore (add *.hdf5)
Storage: add `attr_params` to set attributes in '/parameters'
Rename keyword `pytables_psf` to `psf_pytables`
Make `load_simulation` work.
Add `reopen_store()` to quick reopen a close file.
Add utility to query git status
Storage: initial support to save `position`
Ignore ipython notebook checkpoints
Temp commit WIP