Variable Size Regions! Support for prehash RegionSizeX and large patches. (WIP)

Mostly from Ukando, tweaked a bit to be cleaner, and a little less dramatic.

decode_patch_header now takes a bool optionally, as third argument.
_PREHASH_RegionSizeX is the only used of the two _PREHASH_RegionSize*.
llsurface.cpp: Copy the connectNeighbor for variable size regions almost directly from Ukando
llsurfacepatch.cpp: Patch code from ukando and voodoo.
Changed hardcoded 256 constants and such to width functions in: llglsandbox.cpp, llsurface.cpp, llviewerregion.cpp, llviewerparcelmanager, llviewerparcelmgr.cpp, llvowater.cpp, llworld.cpp
Use region specific width in: llagent.cpp, llglsandbox.cpp, llmanip.cpp, llmanipscale.cpp, llpanelobject.cpp, llviewerbject.cpp, llwind.cpp
Use 256 in llnetmap.cpp in places...
llfloaterregioninfo.cpp: Aurora grid has wacky textures.
Add LLViewerParcelMgr::widthUpdate() for updating mParcelsPerEdge given a region's width. Used in llstartup now.
Add LLWorld::setWidth() for getting a region's size from LLMessageSystem pointers and setting mWidth and mWidthInMeters, accordingly. Called in llviewermessage.cpp as well.
Merge branch 'master' into VarRegion
AuroraSim: non-power-of-two support.
AuroraSim: More tiny bits to help life be normal on the grid.
Merge remote-tracking branch 'Liru/master'
Merge remote-tracking branch 'Liru/master'
added new floater_dae_export.xml translation file and other minor changes
Merge remote-tracking branch 'Liru/master'
Merge remote-tracking branch 'Liru/master'
update string.xml file for user status in panel avatar
Make ubuntu cmake hack do yes up go now
Merge branch 'master' of git://github.com/LightDrake/SingularityViewer
Fix group search's copy uri button copying the link for a personal group always.. Thanks to Malakina Gummibaum for pointing this out~
Merge remote-tracking branch 'singu/master'
Trees shadow parameters use actual debug settings

Use RenderDeferredTreeShadowOffset, RenderDeferredTreeShadowBias,
RenderDeferredSpotShadowOffset and RenderDeferredSpotShadowBias
in place of hard coded values.
Missed a SHGetSpecialFolderPath call.
Texfetch/cache changes:
Added SEND_UDP_REQ and	WAIT_UDP_REQ fetch states.
Parse 'content-range' from headers.
Purge 'complete' textures from the cache if they lack 'end of codestream' marker.
Added boostlevel/category to textureview display.
More diagnostic output.
Discard handling tweaks/bugfixes from v3.
Merge branch 'master' of git://github.com/AlericInglewood/SingularityViewer
FOLDERID_LocalAppData should have been FOLDERID_RoamingAppData
Merge branch 'master' of git://github.com/Shyotl/SingularityViewer