Moved Svn class to separate module.
Added svn.merge() method.
Updated svn-flow feature finish to remove feature branch.
Updated svn-flow feature start/finish to show error when feature name is not specified.
Added svn-flow feature list command.
Fixed svn-flow feature finish to commit the removed branch.
Refactored svn module.:
Refactored svn-flow scripts.
Updated svn-flow feature command help message.