Big Block Changes

removed commands:
ep_sword_block_distance
ep_sword_block_cone

removed TraceBlock function from Sword.uc + overheads

removed Block_Box, BlockBox.uc (temp file, removed when found better
alternative), and Block_Box_Physics

Created new Katana Physics file for block (took about 1 min at most to
setup everything, so easy to replicate for future swords)

fixed bug where attacking and then pressing right click will cancel
block even though you're still holding block (i.e. player goes into
block stance and block stance resets even though player didn't release)

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block state is entered the /moment/ you press right click, so this might
be a little bit overpowered. If need by I can make block state only work
when player has gone completely into block mode. We've gotta see.

type "Show Collision" in console to check out sword physics / block
physics

Known Bugs:

When enemy hits you when you're blocking, the 'parry flash' is located
in a wierd position. Ignore. It just shows location of where the
invisible shield barrier is