Assign4 thid commit
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[DONE]

* Change submit button behavior according to connectivity
* Recheck elements validity and style on page reload
* Initial check of connectivity to update form according to page first
* load
* licence added and readme file been updated

[TODO]

* All drag and drop stuff
* All upload stuff
* Set up Grunt for production build
Merge branch 'master' of https://github.com/anchnk/w3dc-html5