weekly update

Changes

* gzip compression accepted in HTTP requests
* Tests check out with Python client. 
* Demos simplified. 
* optional password accepted for login
* Ruby 2.1.1 tested on travis
* help in shell is SolveBio::help
* webrowser help now working if "Launchy" gem is installed
* shell completion enabled. First the "bond" gem, then builtin "irb/completion".