Adds a second tab for creating a new session to the GUI
Adds a Name text field, Deadline text field, and List of reqs.
Fixes formatting of Left plane under the new session tab.
adds actionListener to createSession button to open up a new tab. Troy
createSession button now opens a creatSessionPanel in new tab. Troy
Adds close button to tabs. Troy
deletes double paranthesis. Troy
Merge branch 'dev-gui-tab' into dev