Tagged bullets properly

This commit targets Issue #15
Bullets were not properly tagged which prevent shooting
Raise the roof

This addresses Issue #18

Increased the spawn height of Mathius, which has mostly stopped the ship
floating up from the collision with the ground.
Reworked spawn animation mechanics for Mathius

This commit address Issues #2 and #19
-Reworked invincibility on spawn, will no longer:
-Destroy on impact in the air on different maps
-BoxCollider will not be disabled so Mathius can still die by hitting
the ground. Noclipping is no longer possible.
Spike and Shield

Implements Issue #17

Shields will protect Mathius from spikes and will take the hit instead
of Mathius.
Merge remote-tracking branch 'origin/Bug-Fixathon' into Release-Builds