New stable version 1.0 released

Here's the summary of the most interesting changes:

- Common caching support for all Nitrate classes
- Persistent cache implementation, MultiCall support
- Experimental support for fetching data from Teiid
- New method TestPlan.sortkey() for case ordering
- New utility functions header() and sliced() added
- Support for colored logging, new custom log levels
- Plain authentication supported in addition to Kerberos
- Huge api module refactored into several modules
- Improved man pages, module documentation and examples

For the full list of changes see the release notes:
http://psss.fedorapeople.org/python-nitrate/notes.html