Interactions

*Added particleArea, with options of 'in' and 'out'. 'in' creates particles inside the target block's area, and 'out' creates particles just ouside of the target block's area.
*particleParam (that thing behind the scenes that sets the source block for particleTypes like iconcrack) now defaults to the target block's type. This only works if the target block is one specific block, i.e. it doesn't have any wildcards in it. If it has a wildcard for metadata, it'll just default to 0 though, so neat.