Improve effective permission determination
Do not include push-restricted, empty repositories for users without push access
Make WicketUtils return the component for more fluid usage
Improved the repository url panel and show git daemon url, appropriately

This will probably be refined some more to merge the http/https and git urls
into a single url panel.
Added SparkleShare invite url panel

This will probably be merged into a refined, single multi-protocol
url panel.
Organize imports
Documentation
Revert "Make WicketUtils return the component for more fluid usage"

This reverts commit 19352c18bd27ea61b9466110c1be874079f60b63.
Do not use problematic WicketUtils fluid api
Improve permission determination when repo is frozen or is not bare