engine/calc_urls:

Moved calc_urls to v1 package.
engine/v1:

Added missing __init__ module.
urls:

Added API versio (v1) to URL mapping.
engine/views:

Include API version in constructed response urls.
engine/tests:

Updated test assertions to include the `v1` component of each url.
Merge pull request #3 from larsbutler/api-version

Include API version in URLs

[r=daniviga] [f=1201775]