Some improvements to send_tweet example

- [x] Handling the exception when libturpial is not in the sys.path
- [x] Now it's possible to parse arguments from the command line
- [] Support for identi.ca protocol
Merge branch 'development' of https://github.com/Turpial/libturpial into development
Added more patterns of untracked files to ignore.
Added initial support for Travis-CI.
Added support for sphinx_rtd_theme, it's awesome.
Added the Travis-CI and Coveralls badges.
Fixed documentation errors.
Merge pull request #37 from milmazz/development

Continuous integration
Merge remote-tracking branch 'turpial/development' into development