Lock geotrellis dependencies to exact versions

The %% flag would fail to install latest dependencies
that havent been updated yet on Maven

Also added note about publish-local users
Bump nginx max client upload size to 50m for API
Update gtfsfeed processing task logic

  - Split warnings/errors
  - Only run geotrellis on no errors
  - Finish implementing is_valid/is_processed logic
Update glyphicons source path
Add GTFS Upload page

See source for a few minor TODO's