Bug fixes to ensure we look at MOSPointSource
Merge pull request #64 from mhvk/gmos-mos-priority-bugfix

Bug fixes to ensure we look at MOSPointSource
added alchemy package to base.
Correct slice offset for IRAF -> numpy
Merge pull request #65 from mhvk/slice-iraf-offset

Correct slice offset for IRAF -> numpy
massive cleanup and mos_spectrum creation
fixing the download
fixed problem with empty observation types
fixed overwriting  download other file problem
removed debug print statement
anorther small bugfix
Merge pull request #67 from wkerzendorf/general/bug_fixing

General bug fixing
Merge pull request #66 from wkerzendorf/general/add_file_mixins

Cleanup of Alchemy and new Spectrum class
some restructuring fixes
small fix
fixed another link and renamed core.py to base.py
added property for value unit
path fixes again as well
added anohter value/unit property
added simple spectrum