dropbox-go: flattened repository

Moved all source files to repository root to match common go repo style.
Also modified README and travis-ci files to match new reality.
Update .travis.yml

No need for tip tests, when 1.2 is released, and enabled in travis, then it will be added.
Update .travis.yml

Default travis test scheme should be fine now.
Merge branch 'master' into flattened

Resolved conflicts in .travis.yml
Merge branch 'master' into flattened

This should add the appveyor support, but it does need to be adjusted
for the new source layout.
Updated AppVeyor support for flattened repository
Merge pull request #3 from cookieo9/flattened

dropbox-go: flattened repository