Merge pull request #1 from IET-OU/master

Merge with IET OU
Dropped JSON_PRETTY_PRINT for php 5.3.3
Fixed hypothesis summary
Handle no data for geomap
Handle no post id for geomap
Fix attribution in comments for "wp-evidence-hub" WordPress plugin PHP

* That is, link to Martin Hawksey/ @mhawksey on GitHub etc.
* Fix typo in README markdown
Add theme-specific styles to Wordpress plugin CSS - HACK!
Fix PHP notices about $post->sector_slug - defensive programming

* Test using "isset()"