convert some development notes into markdown

This is about Ozzymandias -- our BFT layer. Hopefully this is enough
information (together with the JavaDoc) to get a developer started.
add AUTHORS file
link bft 'documentation'
add travis-ci.org integration
disable local S3 tests for `mvn test` runs

The tests try to communicate with S3 servers installed in our local
lab network. Those /may/ fail when being run within another network (:
Merge pull request #3 from andreashappe/master

convert some development notes into markdown, add AUTHORS file and add travis-ci support