Merge pull request #16 from karthiksenthil/master

Added download feature
fixed record destruction
prevent dl counter for incrementing when owner downloads
removed back-to-list link
added has_secure_password
Removed viewing of login form/signup for logged in users
Merge pull request #17 from chinmaydd/master

Removed viewing of login form/signup for logged in users
renamed password to password_digest
Merge branch 'master' of https://github.com/kbhat95/FileHub
Added top downloads listing on home
Merge pull request #18 from chinmaydd/master

Added top downloads listing on home
added bootstrap.css
Fixed login bugs