Improved documentation.

* refactored output module to visualize.
Improved documentation.
chg: Provide a full license file
chg: add package description to the README.md file
Merge branch 'develop' into translator
new: module to translate text using the Bing Translate API
chg: finished with Google and Bing translate. Google is still in
progress, as we need an api key
chg: added NAME and SUPPORTED_PARAMETERS
chg: finished implementation of Google and Bing Translate. Both classes
will return the result in the same format if calling search_documents
chg: cleanup