added optimized.pyx for Cython, and tests for its functions
added missing kwarg to classify.py function
modified imio.read_h5_stack to not fail with kwargs for other imio functions
stop agglo.py tracking 'extent' set after features are built
optimize 'histogram' and 'moments' feature computations with Cython
added 'contact' feature, which helped win SNEMI3D
added adjusted Rand error metric to evaluate.py
fixed u code style and docstrings
convert .travis.yml to build from Conda
added Cython linkage to setup.py
fix test_gala.py for sklearn 0.15
fixed up README install instructions
added test_optimized.py to README test instructions
more docstrings and test style
allow setting random state in RF classifier for meaningful test_gala tests
remove outdated import warnings
fixed ordering of adapted rand error return values
Merge pull request #3 from NealJMD/optimized

 - added optimized.pyx for Cython, and tests for its functions
 - added missing kwarg to classify.py function
 - modified imio.read_h5_stack to not fail with kwargs for other imio function args
 - stop agglo.py tracking 'extent' set after features are built
 - optimize 'histogram' and 'moments' feature computations with Cython
 - added 'contact' feature, which helped win SNEMI3D
 - added adjusted Rand error metric to evaluate.py
 - dramatically improved testing framework
 - updated travis build to use Conda
 - updated README with all the goodies
 - other minor improvements