Fix to get_spectrum() function so wavelength and intensity arrays are always the same length.

return from histograms changed to group bin limits in a list

Error in check for h5 files fixed

laser energy density calculations added

added check for h5 files in simulation directory

Added missing returns in superGauss_beam_conversions_CA

Distribution width definition conversion factors added

functions for standard distributions added

laser_cals errors fixed

added unit order options for Twiss parameters

plotting added to laser analysis

Update to field lineout functions

Functions of lwfa scaling added

update to pwfa_scaling docstrings

docstrings added to field properties and plotting