Fixed some warnings
Rolled some changes back
Fixed some warnings in Server.cpp, and in UI/
Fixed warnings in IncrementalRedstoneSimulator
Changed the m_slotarea position
Add SetOpen() and IsOpen() to BlockDoor.h and fix door redstone bug.
Better SetOpen() and IsOpen() function from the doors.
Add doxy-comment
Moved the IsDoor check before the meta get.
Update Globals.h
Update IncrementalRedstoneSimulator.cpp
Fix itemframe break.
Merge pull request #1060 from Howaner/Inventory

Fix itemframe break.
Merge pull request #1011 from SphinxC0re/SomeWarningFixes

Fixed some warnings
Redstone fixes and improvements [SEE DESC]

Haha, see desc.

* Improved redstone speed through a marking dirty system. Only a select
few devices are still continuously simulated
* Fixed redstone crashing with recent piston changes
docs/Generator: Added the TerrainHeight section.
Start of GPU section.
Typographical error
docs/Generator: Added basic terrain composition.
typo