Remove unsed code.

Several functions, everything in move, and speed-up for 3d
arrays
Do not ignore files that are commited in bottlechest.
Renewed README.rst
Fixed typeo in README.rst
Fixed a wrong check for equality of array shapes in nanequal
Added function bincount
Added folders needed for build to the repository.
Hack to allow pip install from repository.
Added pyx files.
Added c files.
Removed a hack in setup.py.

Pyx and c files were added to the repository which makes calling make before installation unnecessary.
Added valuecount
Using math.isnan in slow.valuecount
Added countnans
Added support for templates for sparse functions
Added routine for bincount for sparse matrix
Added masks to bn.bincount, more tests
Added int8 type to all bn routines
Fixed a bug in bn.bincount for sparse data; added unit tests that would have caught it ;)
Added a TODO