Executables handlers moved to to its own files
gdb targets parser moved out of mapper code
Heap iface moved to comine.iface. directory
Singleton() tool moved to misc.types
Logger moved to single place core.logger
procfs maps file parser updated for iface.maps
Some new misc types for project
Generalized and improved spans ring library
Unit tests for comine.maps library
World of rings api impl for memory aggregation
Memory aggregation model moved to world of rings
Aggregation of procfs/maps data into spans.World
Executable units discovery based on new ring api
World of rings analytical flattening tool
New cli commans for maps world api & updated other

New commands
	show registered rings:		maps ring
	enum all spans in ring:		maps walk <ring>
	find blob in all spans:		maps find <blob>
	find spans by address:		maps lookup <address>
	dump content to file:		maps save <span_path> <file>
	guess flattened map model:	maps flat [ full ]
glibc heap updated to new world of rings api
glibc heap left extending enabled in discovery
Workaround of bug in gdb with handling large ints

cannot convert unsigned large values, particulary big size_t
values converted to negative int and long python types.
Basic support mmap()'ed regs disq for glibc heap