Adds a basic GUI for when the user is either creating a new planning poker session, or a moderator is editing the game.

This basic GUI is currently not functional, but simply provides the basic layout that it will follow. This includes a place to type the name, a drop down menu for selecting a long or short term game (live or not), and selecting the deck of cards that will be used for the game.

There are two boxes that will hold the requirements that can be selected and one for the requirements that have already been selected.
Just added a few comments to make things a bit more clear
Add a drop down menu for the date.

This now has a drop down menu for both month and day. Current the month is an enum. I added an action listener so that the number of days to select from change depending on the month. Currently it only works for either January or not January and the days are not the correct number.

This also now has a "Remove" button for the requirements.
Add proper date and month selection. Sets default session name to the current date and time in "dd/MM/yyy hh:mm:ss" format.

The GUI is now slightly more interactive in that the days that the user can pick from change depending on the month that is selected.
Change from grid layout to sprintLayout. No behavioral changes.
Merge pull request #23 from sfmailand/sbl-dev

Added game settings window
Tested by: Alec Thompson - ajthompson