break out queries for OpenScienceMap-specific 'buildingslite' layer
fix height to match what OSciMap expects, and restrict building:parts to higher zoom
fix zoom aligment on building queries
Merge pull request #11 from mapzen/add-building-parts

break out queries for OpenScienceMap-specific 'buildingslite' layer
Merge branch 'master' into dev

Conflicts:
	tilestache.cfg
Merge pull request #13 from hkrishna/dev

Adding brett's buildingparts to dev