Cleanup Javascript

[Henni]

script.js currently has more than 1800 lines and most of the comments are code comments.

It should be cleaned up by:

• removing all code comments (we don't need them, thats what git is good for)
• adding real comments
  • every function should have its own documentation block-comment to explain what it does
  • skim the code for cryptic code segments and add line comments

[v1r0x]

Was my plan before releasing 0.1. There was/is a lot of code I didn't write and didn't understand completely, but now I'm more into js and osm. Will start the clean up after finishing #120 and #38.