Check style fixes
Remove unused var
Adds dot to compile templates
Don't cache regexes and avoid the _re hack
Do not expose internal implementation
Use object.keys to iterate over objects
Stubs next version
Lock now considers the creation time and compares against a ttl so
a lock is not keep forever in case of failure.

Pending: lazy removal of expired locks.
Adds dot.js dependency
Merge pull request #214 from CartoDB/CDB-4008

TTL for template locks so they are not kept forever
Updates news
Upgrades windshaft to 0.27.1 which downgrades node-mapnik to 1.4.10
Upgrades mocha
Release 1.17.1
Merge tag '1.17.1' into cdb

2014-09-30

Announcements:
 - Upgrades windshaft to 0.27.1 which downgrades node-mapnik to 1.4.10

Enhancements:
 - TTL for template locks so they are not kept forever
 - Upgrades mocha