Merge pull request urbanairship#27 from urbanairship/fix-missing-modules

fix missing reports module, update version

Fixed duplicate ID warnings in docs

Merge pull request urbanairship#41 from urbanairship/0.7.2_bugfix

Added return for segment.from_id()

Update to 0.7.1 to fix PyPI release

Merge pull request urbanairship#26 from urbanairship/formatting

fixed formatting in README

Merge pull request urbanairship#7 from urbanairship/ce-712

updated to 0.6.3 in about file

Fixed doc error

- added CHANGELOG
- version update
- no functionality changes from 0.6.1

fixed version number error, no code changes

Update license to Apache v2