Added signals and initializations

For getting and setting properly
Added History Button

Added History Button to the menu, with function to hide the button if
the user decides to play as guest.
Added History View
Commented out unused variables
Added username validity check

Added a function to check if a username is valid before login and
registration.

When the user selects to play as guest the History button in the main
menu will be hidden
Created History view

Created the History view, this will display user win, loss, and draw
history.
Back arrow SVG for History
Added "back arrow.svg" and History.qml
Added QChart.js as a submodule.
Not used, probably won't ever be.
Allows for chart.js to be used in QML
Additions and deletions
Added username change signal
Created IDs, logout, enable, disable, historyLoader

Created IDs for so that the buttons are all accessible.

Created logout button so that the user can logout.

Created enable and disable functions to disable the menu when a view is
loaded from it

Created historyLoader to dynamically create a History view
Implemented chart, back arrow

Back arrow now actually goes back to the main menu.

Added a dynamically resizing (such a pain) pie/circle chart to display
player score using a modified version of QChart.js
Removed History object

Removed the History object from main, instead the History view will be
created dynamically from the main menu
Removed QCharts

Removed the original QCharts, replaced with modified version.
Added player updating

Added player updating function that will increment a players wins,
losses, or draws.

Added setSession which will set the sessionToken so that players can be
updated
Store objectId, session, added updatePlayer

Now store the objectId for referencing to a specific user in Parse

Store the session token so that players can be manipulated

Added updatePlayer function to call an update on player information
Update player history on win

When someone wins, player 1’s history will be updated.

Pre-staged for draw checking