[spring-cleaning]: Removing unused references to Schools ...

See little need for tracking / displaying school related information
given that we don't ask for it from teachers or students in the first place.
Breaking from the past - if you will
[#99] Incorrect behaviour due to commit 048a1695

Resetting of <input type='file'> field (used for uploading trial PDF)
causing erroneous behaviour

Replaced it with the new upload buttons used elsewhere
[#82]: Temp commit so that changes made for #99 can be merged and uploaded
Merge branch 'master' of github.com:abhinavc/web-application

Conflicts:
	app/views/modals/teacher/_demo.html.haml
	config/routes.rb