add examples sphinx page
fix docstrings in two examples
example headers
Merge pull request #1 from tjhei/examples_in_doc

Examples in doc
Lots of reworking input structure
Move benchmark file into tests.  Not really sure where the best place for this is, but I don't think it's in the burnman directory
Forgot these changes
fix example broken by change in chi_factor
update .gitignore
Merge pull request #2 from ian-r-rose/cleanup_imports

Cleanup imports
Move all the data to a subdirectory of burnman, and modify tools.read_table to read those resources in a more path independent way.
Add new ignores
Add simple script for installation
Fix paths to support files.  I am not wild about hardcoding these...
Fix example
Delete several broken/unused examples
Merge pull request #3 from ian-r-rose/setup_distutils

Setup distutils
fix tests
re-organize material and mineral base classes
fix examples