system now detects spell colour

different minimum charge for each colour
fixed charging bug

spells stop charging when you run out of mana of either colour
Changed camera back to perspective

was playing around with camera, forgot to change back
Camera is now dynamic
Added some example particle effects
Added Red Spells

- game doesn't crash on player death
- red spell damages player
Tweaked mana system

added alpha prefab
added min, max and charge rates for spells