bigness transfer fix

when installing part from inventory
Allow reading fun books even when morale is low
not so retarded colors. Brown is BROWN :P
A few more deconstructable terrain pieces
Changed curtains to more general purpose sheets, modified some crafting
Replace system() call for deleting save files on linux with opendir/readdir/unlink/closedir loop.
Experimental code to replace system() call to delete save directory with system calls on windows.
mend
Wrap code to delete save files in game::delete_save().
Merge branch 'master' of github.com:TheDarklingWolf/Cataclysm-DDA