adding some documentation for the FITSSpectrumWCS class
added some docstrings
specwcs cleaned up.
updating spectrum1d documentation.
finished documentation on Spectrum1D.
updated documentation for read_fits
fixed up the read_fits test cases using @hamogu's testfiles with the new specwcs framework.
updating spectrum1d documentation
finished the documentation for specwcs
commented out interpolation part.
finished updating the spectrum1d documentation
finished fits wcs documentation
fixed the suggestions by @keflavich
fixed numpy intersphinx link - let's see if that works
fixed one more @keflavich comment,
fixed unit problem and now testing truncated UVES file
added uves_truncated files - removed long uves data file
Merge pull request #50 from wkerzendorf/update_documentation_testing

Updating documentation  and testing