Add YUI compressed Biojs.min.js

Add a minified version of Biojs.js. This I believe could be automated via: 
`mvn net.alchim31.maven:yuicompressor-maven-plugin:compress`.  This creates  minified version of all components at `biojs/target`, which I believe should then be copied to `src/main/javascript/minified`. This should be handled  via the build process(through .travis for example or the jenkins way). 

However the `mvn` compression is `0.2K` larger(Perhaps because it keeps some of the `\n`s).

Feel free to decline. This is an effort towards the following trello cards:
* https://trello.com/c/7z08b3ig
* https://trello.com/c/TZRfYre2