Added landmine

Added the landmine to TConstruct source
Various fixes

Fixed images rendering incorrectly in the books and made the drawbridge
accept only real blocks(and only opaque blocks for camo)
Drawbridge slot now uses block to item mappings

Made it so that the TConstruct block to item mappings are used in the
slots of the drawbridge.
Made the top of tool forge/station solid
Merge pull request #62 from fuj1n/16working

Added landmine