Fix memory leaks
Fixed typos
Removed C++ dependency for Cython.
BF: use simple multiplication instead of using exponentiation and pow to prevent the generated cpp code from calling pow (visual c gets confused because it doesnt know what version of pow to use)

Conflicts:
	dipy/tracking/streamlinespeed.pyx
Support list of streamlines having different shape
NF: added faster implementation of sph_harm in shm.py
TEST: vectorized the for loops
Merge pull request #411 from MarcCote/cython_memory_leaks

Fix memory leak in cython functions length and set_number_of_points
Use scipy sph_harm if scipy version is greater or equal to 0.15.0
Pep 8
BF: python 3 compatibility
Use StrictVersion for checking the version of scipy
Removed memory_leak unittest in test_strealine.py
BF: fixing minor mistakes in doctests
TEST: for some reason the map is printed as '<map object at 0xhhhhhhhh>' in some platforms, list comprehension should be more standard
Merge pull request #417 from omarocegueda/fix_streamlinespeed_tests

Fix streamlinespeed tests
Merge pull request #416 from MarcCote/remove_resource_dependency

Removed memory_leak unittest in test_strealine.py
Merge pull request #413 from Garyfallidis/faster_sph_harm

Faster spherical harmonics
Rename README.txt to README.rst
Update info.py