Improved bbox calculation
Call saving only once and get bbox information using gdal
Set center, zoom and bbox string from bbox_x0 and friends
Fixed metadata saving
Remove README from static folder and add Makefile instead.
Added static handling to paver setup
Layer now keeps track of upload_session
Updated paver documentation
Merge pull request #1479 from ingenieroariel/static-building

Static building
Added python-gdal to .travis.yml
Added python-gdal to README
Merge pull request #1480 from ingenieroariel/save-once

Save once