It is there. Just change the source control options in visual studio to use Ankh instead of TFS.
Go to Tools/Options/Source Control/Plug-in Selection, select the AnkhSVN plug-in.
Then restart visual studio and you are good to go. Its working perfectly for me.
Or reinstall the complete ankhsvn client. As this guy here:
AnkhSVN settings menus not showing up in VS2012