AIFile bug fixes.

Compare with errno instead of rc.
Make sure errno is preserved.
Fix shadow dithering. It's still pretty ugly tho, but looks okay if ssao is enabled. May add random kern in the future.
AIAlert fixup.
Revert upstream change to particle index accounting. (Fixes flicker issues)
[LLScrollColumnHeader] Fix icons disappearing in certain states, such as click.
[LLScrollColumnHeader] Fix the ImageOverlay icons being overwritten every draw and thus destroying our image_overlay parameter!

Seriously, whose idea was that?
Ignore space changes and this will be a lot easier for all of us.
[Warnings] Fix signed/unsigned mismatch in llpartdata.cpp
Merge branch 'master' of git://github.com/AlericInglewood/SingularityViewer
Merge branch 'master' of git://github.com/Shyotl/SingularityViewer
The rest of the french updates from Nomade Zhao
Fix the UI Warnings in LLFloaterModelPreview

Adds the green check and red x icons
Adds Price Breakdown text to the mesh upload floater, quite useful!

Removes useless ui element references in only code
Comments out ui element references in only code that we don't have and don't have a clear place
Fixed fetching inventory when UseHTTPInventory is disabled
Attempt to resolve shader compilation errors on osx since it's particularly picky.
Merge branch 'master' of git://github.com/Lirusaito/SingularityViewer
Merge branch 'master' of git://github.com/Shyotl/SingularityViewer
Fix uninitialized variable warning in alphaF.glsl. Also made USE_VERTEX_COLOR actually work if FOR_IMPOSTOR is set.
Merge branch 'master' of git://github.com/Shyotl/SingularityViewer
Code cleanup in pie menu

Cleaned up hover logic and slice from x and y code duplication
(Best viewed without space changes)
Let shift-left-clicking in the middle of subpiemenus move back to the parent piemenu!
Actually fix the french translations (codepage borks yay) Thanks Nomade