Furniture changes and fixes.

In answer to Issue #4357 

-Exercise machines, sofas, armchairs, dumpsters, trashcans, dryers, and washers are now all smash-able.
-Indoor plants are flammable.
-Open crates can be deconstructed as well.
-Tables now require 8 strength to be moved around.
-Fix missing additional "O" in bookcase flag: "BLOCKSDOOR".