Write the bootstrapper

[Nathan2055]

• Read from ./denver folder
• Running from denver.jar in ./
• Create config.json and use for stuff
  • Store current launcher and patch version
  • One extra field at lowest level - repoIndexURL, will be added by native bootstrapper, provides base URL for downloading everything else to prevent Deep Island exploit
• Read from latest.json which will be provided by native bootstrapper
  • Will have latest available denver patch
• Check for new Minecraft launcher version and see if Colorado patch exists

[Nathan2055]

At some point you need to write in real error handling.

Locations:
Line 31 @ Denver.java