configure travis to test both develop and master branches
Move readme section about adding a service broker into new page in cf docs

README
- move the section about adding a service broker into new page in cf docs
- add notes about testing the example app to readme
- include cf and gcf commands in readme
- remove misc section in readme
- add links to the various CF docs on service broker.

Other files
- restructure settings.yml file to be consistent with docs
- clarify instruction comment in integration test file