openlayers/ol3 — pull request #1641 by htulipe (2014-02-04 21:42:25+00:00)
Title: Support parsing of kml:datetime (#1585)

This commit modifies the previous regex in order to match
following datetimes:

- 2014
- 2014-02
- 2014-02-15

The new regex also matches dates that were matched by the previous
regex.

This commit also include a unit test for kml:dateTime parsing.