Fix broken display when changes pending. eg. favourites block when pending change is to one of the displayed facts

Removed ".block .old" & ".block .new" classes
Merge pull request #221 from ddrury/CSSfix

Fix broken display when changes pending.
Error in error message when merging non-existant records
#1340440 - Mail from site to administrator is in unexpected language
Import classes, per PSR autoloading standards
Code without side-effects (see PSR-1) does not require guard headers
New responsive/accessible admin theme - using bootstrap