Merge pull request #4 from IET-OU/master

Code portability, MSIE 8 message, fix editing student problems
Fix - Skeleton's `.clear` makes WordPress footer disappear!

* https://github.com/mhawksey/wp-evidence-hub/issues/20
Fix for when map zoom is not set in the DB - WP: get_post_meta()
Merge https://github.com/IET-OU/wp-juxtalearn-hub