Added files adapted from python-avm-toolkit
More refactoring
PEP8
Tidied up license
More explicit errors (include tag name) and only raise warnings for incorrect URL/Email rather than an error.
PEP8
Adding FITS Liberator keywords
Merge pull request #4 from kapadia/refactor

Adding FITS Liberator keywords
Refactored embedding to use proper parsing of formats. Dropped support for TIFF files for now as file structure is much more complex.
Fixed bug with float list
PEP8
Switch to using Astropy
Added test files
Fixed tests
Allow '-' in ordered float list (used for Distance)
Updated README
Properly extract AVM meta-data, don't just search for any packet.
Added more tests, and fixed bugs. Fixed unicode vs UTF-8 in Python 2.x.
Fixed Python 3 compatibility
Added simple .travis.yml file