Update Django version to the 1.6.3 security release
Add default value for title slug where no position title exists.

Fixes #1403

It was possible that members of an organisation could hold a position
without a title set; this would cause organisation pages to throw an
error. This catches those cases, and ensures the page behaves as
expected.
Merge branch '1403-missing-position-title'
Fixed typo: "souce" to "source"
Don't try to return boundary changes for places with no MapIt area

We were getting error emails for a couple of places that had no MapIt
area associated with them - these are historic data where it's going to
be difficult to get missing data, so let's just settle for not showing
boundary changes for these cases.

Fixes #1335 and #1377.
Merge branch 'fix-for-missing-mapit-areas'
Add "latest news" blog to home page of ShineYourEye
Improved design for the list of blog posts.
Tidy up the blog post styles.