Merge pull request #12 from karthiksenthil/master

Changed the params in attempt_login
changed default route to /uploads/home
Merge pull request #13 from karthiksenthil/master

Added before filter for authentication
added name, description fields to uploads
added file upload form, associated actions, before_action exception for signup
tweaked uploading configs
added delete option for upload
Merge pull request #14 from shiva96b/master

added delete option for upload
removed ~ files
Added Logout function
Merge pull request #15 from chinmaydd/master

Added Logout function
ensured delete option shows only for files uploaded by current user
Changed user_controller
Added download feature to uploaded files