* minor changes to networking headers.
* addition of several virtual destructors (remove warnings)
* switched Makefiles to new system.
* added macosx specific configuration file.
* removed KadC compilation checks.
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@324 b45a01b8-16f6-495d-af2f-9b41ad6348cc