- Added a ChunkMap class responsible for allocating new chunks to be downloaded, according to

- a given chunk strategy
	- the availablility map of each source 
- Integrated this into ftFileCreator
- added gui menu in file transfer+right click to change the chunk strategy: streaming vs. random

Next step: 
	- loading/saving file downloading state and availability map
	- displaying chunk details in the selected transfer tab (e.g. list of currently worked chunks, and their current downloading completion)



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1863 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/ft/ftcontroller.h

@@ -132,6 +132,8 @@ bool 	FileRequest(std::string fname, std::string hash,
 			uint64_t size, std::string dest, uint32_t flags,
 			std::list<std::string> &sourceIds);
 
+bool 	setChunkStrategy(const std::string& hash,FileChunksInfo::ChunkStrategy s);
+
 bool 	FileCancel(std::string hash);
 bool 	FileControl(std::string hash, uint32_t flags);
 bool 	FileClearCompleted();