Website changed to use GruntJS

Changes made to root:
- Gruntfile created
- package.json created
- index.html changed to use correct css and js folders

Changes made to CSS folder:
- bootstrap CSS files moved to css folder
- stylesheet moved to css folder

Changes made to font folder:
- bootstrap font files moved to font folder

Changes made to js folder:
- bootstrap js files moved to js folder

Changes made to node_modules folder:
This folder contains all the module files for grunt (1251 files):
- Grunt
- CSS Lint
- JSHint
- QUnit

Changes made to test folder:
- QUnit.js moved from js folder to test folder
- Index.html starts the tests
- separate files created for test functions
- Test written to check if an email address is valid