Incremented redmine_git_hosting version from 0.4.6x => 0.5.0x

This is a feature release which provides compatibility with Redmine 1.4.

It also includes a few bug fixes.  See release notes at:
https://github.com/kubitron/redmine_git_hosting/wiki/Release-Notes

README.mkd

@@ -18,8 +18,8 @@ the Redmine trunk or Redmine version 2.x, since the plugin is not currently comp
 
 * **ChiliProject:** This plugin should work with ChiliProject 2.0.0 through 3.3.x. It has been successfully used with at least 2.0.x, 2.5.x, 2.7.x, and 3.0.x, and 3.3.x releases, however some problems have been occasionally reported with newer versions of ChiliProject.  These incompatibilities will get fixed when possible. 
 
-This plugin is compatible with most versions of gitolite.  However, gitolite versions >= 2.0.3 provide slightly better resilience to recover from configuration
-problems that prevent administrative access (the plugin will exploit **gl-admin-push** to fix the access key).
+This plugin is compatible with most versions of gitolite with versions < 3.x.  There have been unconfirmed reports that it has problems with gitolite version 3, so it is best to avoid these for now.  
+Gitolite versions >= 2.0.3 provide slightly better resilience to recover from configuration problems that prevent administrative access (the plugin will exploit **gl-admin-push** to fix the access key).
 
 ## Configuration Strategy