Introduced a minimal version of RetroShare.

You can enable it in libretroshare.pro and RetroShare.pro by uncomment
CONFIG += minimal

This enables two new defines for stripping all not needed things
- libretroshare: MINIMAL_LIBRS
- GUI:           MINIMAL_RSGUI

and removes not needed files from build (see end of the files libretroshare.pro and RetroShare.pro).

Beware: All data of the stripped services are lost

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@3414 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/rsserver/p3face-config.cc

@@ -169,7 +169,9 @@ void    RsServer::ConfigFinalSave()
 void RsServer::rsGlobalShutDown()
 {
 	// TODO: cache should also clean up old files
+#ifndef MINIMAL_LIBRS
 	mChannels->cleanUpOldFiles();
+#endif // MINIMAL_LIBRS
 	ConfigFinalSave(); // save configuration before exit
 	mConnMgr->shutdown(); /* Handles UPnP */