Add JGit gc command

David Ostrovsky

2014-03-19 f6109ecd5d05bef6f06d82cd26bed358455979ab

 src/main/java/com/gitblit/manager/IGitblit.java

@@ -31,6 +31,7 @@

public interface IGitblit extends IManager,
                           IRuntimeManager,
                           IPluginManager,
                           INotificationManager,
                           IUserManager,
                           IAuthenticationManager,