Initial commit
Toggle checkbox imported
Changesets now are merge in the history

Changesets will now be merged in the issue journal history.
For that purpose the standard show view of issues controller is
overwritten.
Fixed bug: No reverse order possible

Because of merging the two journal and changeset arrays the reversion
from the controller is lost. Therefore it must be redone.
README written
Merge branch 'master' of https://github.com/raafael911/redmine_issue_repo_history_merge
Some documentation in README.rdoc