Added TAI parsing ability time.parse_time
Reformmatting changes
Edited docstring of parse_time parameters
lets see
time_format added to parse_time
parse_time parameter time_format added
Removed TAI parsing ability from parse_time
Minor change
float interpreted as utime
changes incorporated
merge conflicts resolved
Docstring corrected
break_time method parameter defaults to 'now' from now on
Added support for gzip compressed FITS files.
Added test for gzipped FITS files
Make CROTA2 default to 0.

If no rotation information in the header, the default is 0.
Fixed broken link for Matplotlib

Matplotlib link was broken.  Removed the double http:// to fix it.
Add STEREO HI colour maps and a HIMap class.
Updated test directory entry counts in testcases
Use union merge strategy for the changelog