[gtk+] Fix scrolling with certain mice/trackpads

BXC7798 - Scroll doesn't work with some kinds of mouse / trackpad
[gtk-sharp] Fix build not to rely on github tarballs
Bump mono-2-10 to 2.10.12
Bump version number to 3.0.6
Include the cairo cglayer patch
Bump version to 3.0.7
Revert "Bump version to 3.0.7"

This reverts commit 79c247a6a13040d0524e3d619625bb30779cef95.
Check if the cache is valid in _fetch_sources.
[glib-unstable] Added new package for glib 2.35.8
[gtk+] Enable accessibility so window manipulation tools work
[gtk+] Update patchset for GtkNSView fixes
Bump version to 3.0.7
[gtk-sharp] bumped gtk-sharp revision for a null Gdk.Event fix
[gtk-sharp] bumped for another fix
Merge branch 'master' of github.com:mono/bockbuild
Fixed cairo.py ctor to properly chain up
[package.py] Fetch freedesktop.org packages from cgit since the website is frequently down
Revert "[package.py] Fetch freedesktop.org packages from cgit since the website is frequently down"

This reverts commit 7606c791e9450fc7a299b37500bbe0ddfa22f413.
Switch freedesktop.org pkgs to use our own server.
Build mono with -O2.