Fixed popping and other tile related issues
Merge pull request #73 from OpenGeoscience/improve_tile_somemore

Fixed popping and other tile related issues
Updated vgl
Updated class names
Added necessary geojs third party libraries
Merge pull request #77 from OpenGeoscience/update_geojs_to_vgl

Update geojs to vgl
Fixing issues with point sprites
Updated vgl
Updated point sprite example
Removed old example
Added support for points size
Merge pull request #78 from OpenGeoscience/add_support_pointsprites

Add support pointsprites
checking mouseout event for leaving the main map div
Merge pull request #80 from OpenGeoscience/fix-mouseout-handler

checking mouseout event for leaving the main map div
Fixed features not getting removed beyond max number
Optimize the code a bit
Fixed wrong logic
Fixed minor style issue
Prevent divisin by zero
Added API to set tile cache size