Update package.json

Attempt to resolve napa on Heroku
Updated gruntFile.js

Add grunt support for Heroku
Minor change to package.json

Update the description a bit.
Rename gruntFile.js to GruntFile.js

Heroku build pack looks for a different file name.
Update package.js

Move grunt dependencies needed for Heroku deployment from dev to main.
Update security.js

Moved Facebook app settings to environment variables
Added new favicon.ico
Added lots of features

Word validation, word search, improved UI
Added .gitignore