fix element mapping and setting
mutable addition and subtraction for vectors
mutble matrix add and subtract for matrices
update to latest core.matrix release, fix element-map issues
Merge remote-tracking branch 'upstream/master' into core_matrix

Conflicts:
	src/clatrix/core.clj
extra tests
more efficient shape testing
getter and setter optimisation
minor optimisations
extra docstrings
fix slicing and mutable view modification
docstring edits
use core.matrix 0.17.0
move registration to end of file
add test case for concurrent Clatrix implementation loading
Merge branch 'core_matrix' of https://github.com/mikera/clatrix into bleeding