Moved the temporary mapgen test files and added a modified map.cpp too... These are probably useful in the next mapgen update and shouldn't be lost.

--HG--
rename : src/noise.cpp.new => misc/noise.cpp
rename : src/noise.h.new => misc/noise.h

Add (possibly non-compatible) work-in-progress noise.{h,cpp} so that they won't be accidentally lost. These are useful for upcoming mapgen updates.

added -Wno-unused-but-set-variable, which hides a new warning in gcc 4.6 which only slows down development with no effect on security or anything.

--HG--
extra : rebase_source : a35aa0d978990c28fa4fc158ce47d1f4aa967c04

--HG--
extra : rebase_source : 178fe08f10b7de3ebaba088bd24faad795114216

Fixed a temporary solution of server shutting down to an assert(0) when a too large block metadata is sent to an old client