benchmarking fromList -- fromList loses badly!
reverted to simple foldl' based fromList for now for 10x speedup in benchmarks. Switched back to left to right behavior for the fold to match Data.Map
added fromDistinctAscList
reverted to naive inserts for fromDistinctAscList as well!
improved the baseRate based on fryguybob's benchmarking

Conflicts:
	src/Data/Vector/Map.hs
Better split and union. Removed union'
Merge branch 'master' into one

Conflicts:
	src/Data/Vector/Map.hs