implemented pan up down left right
Merge branch 'refactor' of https://github.com/Zephoku/Whiteboard into refactor

Conflicts:
	www/index.html
	www/js/whiteboard.js
merged files
Placed pan buttons
Merge branch 'refactor' of https://github.com/Zephoku/Whiteboard into refactor

Conflicts:
	www/index.html