Peridexion v0.5

Version 0.5 has been release and a windows installer has been posted. This is an exciting release with lots of changes.
* Plug-in API has changed and is now based on QAbstractItemModel
* The old Model has been removed due to the new API
* The SVK plug-in has been removed. It needs to be converted to the new API.
* The Subversion plug-in now uses libsvn instead of the svn command line client. This means updates are extremely fast.
* When committing changes to multiple branches with the Subversion plug-in all the changes go to the repository as a single commit.
* The Subversion plug-in is a little bit more resilient when the cached data is old. There will only be a commit error when a modified branch has been changed more recently.

See the release notes for additional information.