fixed logged in user on load tests. Added a large load test data set as a task
fixes to small ui issues

* corrected case in login page
* changed background image to be non-retina
Merge branch 'develop' of https://github.com/unikent/programmes-plant into feature/minor-ui-fixes
Fixed where still using Programme rather than UG/PG Programme class
Merge branch 'feature/minor-ui-fixes' of https://github.com/unikent/programmes-plant into bugs/fix-ug-pg
minor fixes to login text. fixed snow image
Merge branch 'feature/load-tests' of https://github.com/unikent/programmes-plant into bugs/fix-ug-pg

Conflicts:
	application/seeds/load-test-data.php
fixed test data seed and pg big load test task
Merge pull request #421 from unikent/bugs/fix-ug-pg

Bugs/fix ug pg