Added travis ci builds for python 2.7 and 3.3
Removed u-prefixed unicode strings and used the __future__ unicode_literals
Merge branch 'master' into python3-support
Merge branch 'master' into python3-support
Use dict.items instead of iteritems for python 3 compatibility
Use 2to3 in setup.py
Merge branch 'master' into python3-support
Run nosetests with the -P option to not make any changes to sys.path when loading tests
Added Python 3.3 and 2.7 classifiers
Merge branch 'python3-support' closes #2