New Shield item, Hyper Cannon and Hyper Shockgun weapons

-added Hypercannon and Hyper shockgun as pickup weapons

-Hyper cannon, Hyper shockgun, and Plasma luancher can only be  found in match and cannot be selected in the menu

- added shield pickup.

- shield pickup has been temporarily disabled in WebGL player build due to bug causing the game to crash, doesn't seem to happen on standalone. will be fixed soon.    (Edit) This is now fixed in current web build.