Add JavaScript in the Front-End.

[karamolegkos]

Add JavaScript in the html pages so the user will be able to have friendly messages and interactions with the site.

[karamolegkos]

The Calendar is able to show the current month in a user friendly way using javascript.

[karamolegkos]

Made updates to representate the way that an API andwer will look like in the Calendar.
Changed the colours of the Calendar and the way it functions.

[karamolegkos]

Made some JS to represent how a dummy event will look like in the "View Event" page of the web app.