Adding draft config file for building on Travis.
Adding requirements.txt to travis install and specifying DJANGO versions
Add Excel formatting method to the AgeFormatter
Remove to_number/string/boolean methods and fix to_csv on AgeFormatter
Merge pull request #15 from cbmi/issue-8

Fix issues in AgeFormatter which caused Excel export to fail
Update to Cilantro 2.1.5, fix browser warning
Merge branch 'master' into demo