Modified messageDetail directive
Added W3C validation to Project and Grunt.

run 'grunt html-validation' for html validation
run 'grunt css-validation' for css validation
run 'grunt validation' for both css and html validation
Added W3C validation instructions to README
Started fixing W3C validation errors in HTML.
Removed unecessary lines in Gruntfile
Added Angular HTML validator aswell as W3C standard

Run with html-angular-validation
Added angular validation to README
Merge branch 'master' of https://github.com/jarlefosen/INF5750-group-assignment
Merge branch 'master' into FH-30-w3c-validation
Merge branch 'FH-30-w3c-validation'