Sync code with internal version

	- fix bug in Poisson-disc for Y > X
	- add normalize tool
	- rss now uses a bitmask (incompatible!)
	- rename functions md_rss to md_zrss and md_rrss to md_rss
	- sense/rsense tools: allow more dimensions than dims of maps
	- clear memory in casorati_matrixH
	- refactor numerical phantom
	- more benchmarks
	- move some functions src/misc/utils.c
	- other minor changes and additions in the library