http://trac-hacks.org/svn/componentdependencyplugin/0.11#egg=ComponentDependencyPlugin
http://trac-hacks.org/svn/ticketsidebarproviderplugin/0.11#egg=TicketSidebarProvider
http://trac-hacks.org/svn/tracsqlhelperscript/0.12#egg=TracSQLHelper
