Added new essence types
Created extra method handling applying shimmering effect to items
Changed name from 'explosive' to 'lightning' in order to reflect new essences
Renamed existing 'explosive' essence to 'lightning' in order to allow for addition of proper 'explosive' essence
Added item tooltips for abilities
Changed an error in a 'for' loop that meant one crystal wasn't included in the creative menu
Ammended a mistake in the code, changing EssenceLightning to EssenceFire
Increased the durability on the 'Crystal' tool material
Added potential support for all crystals to cause an essence to be applied
Added new Essence effects for the Sword