Added SFHelper files and changes

Added new doclet file for generating a json file
Added a json.lua file for ease of generating
Added a SFHelper button in the editor
Added sfhelper.lua file
Changed sflib.lua to include sfhelper.lua
Reminder to change documentation location
Added licence to json.lua
Changed title of window and some text on info page
Changed "SFHelper" button to correct codestyle

Also added newline at bottom of sfhelper.lua
Changed link to json doc and more codestyle stuff
Merge pull request #275 from Jazzelhawk/SFHelper

Added a Starfall Helper