reciprocity/ggrc-core — pull request #1265 by SilasX (2014-04-18 00:06:26+00:00)
Title: Feature/key control import

Per [63879474](https://www.pivotaltracker.com/story/show/63879474). Problem was traced to incorrect pairing of 1/0 to Key/Non-Key. Was being imported correctly but rendered incorrectly to the user.

Also say that "key control" field wasn't being exported, which was due to non-basestrings being truncated to `''` non-exports; now non-`None`s are converted to strings for export.