getNextCard() callable via AJAX

Implementation to change. This is a placeholder.
Small Functional/Cosmetic Update to Play Page

Buttons subtly flash on click; space bar/clicking on the card actually
flips it now with a pleasant quick fading animation.
fixed some x-browser issue; aligned form boxes; removed borders; small modification to landing page stats; changed content blocks on import page
beginning of algorithm for playing
Added the ability to save changes to the decks.
Various quick nav button features and files
Moved switch_buttont to external html, css, and js.
Updated pie chart colors to be readable.
Updated hotkeys & Help; jQuery AJAX is a WIP

The WIP AJAX stuff does not interfere with the functionality of
anything; the Play page is still functional/safe.
Button functionality, began implementing landing page for scores.
(MIGRATION) Add Times Cloned field to database, logout button to nav bar and basic search functionality with results page
Merge branch 'development' of https://github.com/latreides/SE_Team3 into development
Play shows deck titles, themes & new settings icons

Non square themes result in an ugly box shadow.
Empty Yaml file import redirection
Fixed a bug with deck indices in the PlayDeckPage.
Added card preview scrolling, and deck tag saving.
Added playing functionality, need to add functionality for moving to next card
finished password change and updated forms on import export to be centered
Made visual improvements to the mini preview scroller.
Merge branch 'development'