Adds deconstruct structure helper
Moves chair sprites from objects.dmi to chairs.dmi
Fixes check shields passing proper flags on unarmed attacks
Makes stools and chairs able to be picked up
Beds (and chairs) now have buildstacktype and buildstackamount vars to handle how many sheets of what they should drop on deconstruction.
They also have a foldabletype var to handle folding into item (currently only used by roller beds) so that people can add foldable chairs in the future.
Fixes swivel chairs not dropping the correct amount of metal sheets.
Adds two generators : Asteroid and Syndicate
Syndicate templates
Finish syndicate templates
Moves border and repressurize to helpers.dm
Repressurize generator
Shuttle generator
Buildmode now resets the corners when switching modes/generators