Merge pull request #2 from greglandrum/master

Code cleanup, addition of a general descriptors method, and addition of ctab2svg
1. Chemistry logic moved to utils
2. Added ctab2json/smiles2json
3. Settings file has different format and can be specified dynamically
4. Different way of configuring OSRA
5. run_beaker is exposed systemwide
6. Tests made in completely new way and more tests added
7. Many small bugfixes
8. Updated documentation
9. Version bump
bugfix
version bump
missing tests added, small bugfixes, version bump
Update README.rst
adding temporary logo
bugfixes, version bump
Update README.rst