first working version of different option how user are shown (#27)
renamed VoterRenderer to UserRenderer and moved it to VoteConfig
moved the backwards compatibility of voter style from "VoterStyle" enum
to "getVoterStyleFromString" and added tests
renamed VoterStyle and visibleVotersWiki internally to UserVisualization
(not renamed plugin parameter)
some renamings
used UserVisualization directly in UserRenderer and test it
added new parameter to atlassian-plugins.xml inclusive handling and
backwards compatibility
adjusted user visualization in CSV export
Merge pull request #39 from aaschmid/choose.user.name.style

Added different options how "user" are shown (#27)