Made Earth inherit from BaseEstimator, RegressorMixIn, and TransformerMixin
Added scikit-learn to travis
added scipy to travis
try installing scipy with apt-get
Added some sklearn-style input checking
Wokring on documentation
Added sphinx stuff
Added doc/_build to gitignore, making sphinx behave
Improved the doc a little
worked on docs
Made image generation automatic.  Small edits to earth.rst.
Added API documentation.  Fixed all the warnings.
First pages commit
Merge branch 'gh-pages' into sklearn

Conflicts:
	doc/conf.py
Fixed conflict from merge
Fixed another merge issue
Added bibliography.  Improved version handling.
Minor improvements to index page
Removed accidentally commited .settings folder
Made some improvements.  Removed index.