Target v1.3.4
Upgrade windshaft to improve CSS error messages
Add note about cache dir need to be writable by server user

As per
https://groups.google.com/d/msg/cartodb/z06r9SwaoOM/b34In4TTdd0J
Rename sqlapi.host configuration to sqlapi.domain. Closes #79.

Support for "host" is retained for backward compatibility.
Fix config/environments/test.js Makefile rule
Upgrade to latest windshaft for more stable test results
Fix race condition in localization of external resources
Fix check-submodules rule not to fail if a submodule is missing
Merge branch 'release/staging'