Improve tile resolution
Using last zoom as the key for process identification
Using visible tile index logic
Optimized the code a bit
Silenced warnings
Reduced the time to 10 ms
Fixed some tiles not showing up sometimes
Fixed documentation
Removed debug code
Fixed update id not found
Removed unnecessary API
Merge pull request #173 from OpenGeoscience/high_res_tiles

High res tiles
implement osmLayer tilesLoaded event
adding map.onIdle
moving onIdle logic to object
migrating to jasmine 2.0
fixing jasmine test runners for version 2.0
adding testing for object.onIdle