Add results fp option to bench.sh

Also reports errors when running bench scripts
Fix several bench scripts

Many were erroring out, likely due to changes in biom-format API since they were originally written.
Add some performance improvements
Remove SparseDict and SparseMat backends

Also add hyperlinks to biom-format dependencies on index page.

Fixes #221. Fixes #205.
Update reference to biom.csmat
Merge pull request #224 from jrrideout/issue-221

Remove SparseDict and SparseMat backends
Remove python-code directory

Fixes #212.
Update setup.py and docs since python-code is gone
Merge pull request #225 from jrrideout/issue-212

Remove python-code directory
Add BSD license
Update doc license to BSD
Minor doc updates for new BSD license
Update copyright in source files
Update license in source files
Updated copyright in source files in some stragglers
Update copyright in sphinx conf
Update changelog with license change info
Update top-level source files with new header
Add header to biom/ source files
Add header to unit test source files