adding layer_name to featuers in the opensciencemap vtm tile
deleting an unnecessary logging statement
Merge branch 'integration-1' into add-layer-name-to-vtm-tiles

Conflicts:
	TileStache/Goodies/VecTiles/oscimap.py
Merge pull request #8 from mapzen/add-layer-name-to-vtm-tiles

adding layer_name to features in the opensciencemap vtm tile