added get_user
fixed format of string in CrowdServer __repr__
modified unit tests for get_user
added add_user method
changed dict iteritems() to items() for python3
added contributor
use semantic versioning
updated copyright year
updated version info in docs
updated copyright year
added readthedocs theme
output docs with readthedocs theme
Merge pull request #1 from aelse/master

Pull request for my branch