Rebase JS array extensions to use lodash 2.2.1

I tried to use a minified version of lodash but Jint broke, opened an
issue there: https://jint.codeplex.com/workitem/6986

Deleted Map.js and put everything in RavenDB.js
Changed order of inclusion - lodash first, json2.js second, RavenDB.js
third
Added dump() utility function which will add a message to the output
with an object serialized as JSON - quite useful for debugging