Update PROPOSAL.md
Update PROPOSAL.md
Merge branch 'master' of github.com:osmlab/dcbuildings
Merge pull request #13 from andinocl/patch-1

Update PROPOSAL.md
Update PROPOSAL.md
Update PROPOSAL.md
Update PROPOSAL.md
Update PROPOSAL.md
Update PROPOSAL.md
Merge pull request #20 from tlpinney/master

Added documentation on installing dependencies
Added documentation on installing dependencies
Merge pull request #21 from tlpinney/master

Add requirements.txt and add info on installing virtualenv
Add info on installing virtualenv
Add requirements.txt
Move out of appendBuilding().
Merge pull request #22 from tlpinney/master

Case-sensitive fix
Case-sensitive fix
Dedupe nodes, addresses #11. Slow.
Speed up 100X.
merge.