Minor change to buttons and levers

+ They now detect if the block they are on occupies its voxel, instead
of just being solid
Added more block exceptions to torches
Changed include folders to work for Bindings, too.
Fix sheep color's, add shear sound.
Save IsSheared from Sheep.
CMake: Added polarssl include dir as non-system.
Fixed a silly path error in #include.
Implemented tripwire(s) (hooks)

* Fixes #944
Fixed issue with breaking blocks at -1 coordinates
Fixed doxycomments
Likely fixed too quick food depletion

* Fixes FS427 properly, hopefully
An unification of code style
Merge pull request #1132 from mc-server/RemoveMD5

Removed the md5 library, obsoleted by PolarSSL.
Code fixes.
Send statistics to the player, when he logged in.
Merge pull request #1136 from Howaner/GlobalFixes

Send statistics to the player on login.
Properly implemented enderchests
Removed bad comment
Fixed offline UUID generator.

It generated invalid UUIDs, too many hex chars.
Suggestions