Development branch
Created an enum class which some basic enums taken from server.js
Updated group.js and restructured lib.js

Added functions regarding deletion of members and collisions in the
group.
Divided the library into different functions with appropriate
documentation.
Whoops, fixed error in lib.js
server.js geslipt in meerdere functies. username opslag verbeterd. groups gebruik op server

Oops iets ging fout met het hernoemen van twee bestanden. Let dus op bij
het mergen
working  multiplayer stuff
Merge branch 'development' of https://github.com/olafmaas/contextprojectgroep6.git
Updated sprite class with more functionality. Also added an image to the first ball in the client game.
Made a start with rotating sprites.
Added rotation ball sprite and made variables in sprite class private.
Updated documentation in Camera and Game
.
Merge branch 'development' of https://github.com/olafmaas/contextprojectgroep6.git