fixed redirection to wrong url of links and added comments to controller and model files
removed uncommented alert statement
added database folder to share tables and added 'contests' table and 'problems' table
added comments to the controllers and models
changed colour combination of few buttons on contest main page
Merge remote-tracking branch 'upstream/master'
removed index.php from the url by modifying .htaccess file
working on practice
Working on Practice page
Support for backend: Compiler and Judge in .c file to be compiled in chroot directory, few demo problems, upload script, script to keep judge alive, check the output