Major bugfixes and testing changes for ft.

It is now almost ready for integration with rs.

Added ftserver3test.cc which successfully tests:
	* Hashing of a directory.
	* Transfer of Cache Files.
	* Local Searching.
	* Remote Searching.
	* Download from multiple sources.




git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@773 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/ft/ftfilecreator.h

@@ -46,6 +46,7 @@ public:
 
 	 /* overloaded from FileProvider */
 virtual bool 	getFileData(uint64_t offset, uint32_t chunk_size, void *data);
+	bool	finished() { return getRecvd() == getFileSize(); }
 	uint64_t getRecvd();