Builder|Fixed: Sign and publish the latest build, not today's

These changes allow the day to change during a build; the steps
following the initial tagging now operate on the latest available
build rather than today's build.
Fixed|Window Manager: Crash during abnormal shutdown message

The main window must be deleted (or its drawing prevented) or otherwise
a crash will occur while the shutdown message is being shown.

Fixes regression introduced by https://github.com/skyjake/Doomsday-Engine/commit/43414ec10be77f1e9c6dc3c0cc5752caa924b318
Merge branch 'ui-framework'
Documentation: Updated cphelp.txt
Cleanup
Fixed|libdeng2: Calculating build numbers

Adjusted the build number formula to work exactly like the one used
by the autobuilder. libdeng2 had started to drift apart...
Fixed: Player viewport disappears after resizing window

It appears there is a bug with the code optimizer of GCC 4.2 that
caused libcommon's ClearPlayer() to incorrectly clear the player's
DDPF_LOCAL flag, causing a subsequent view update to not find any
local players.

GCC 4.2 is used in the Mac 10.6 and 10.8 builds.
Homepage: Updated source package to 1.10
Homepage: Enable download of the OS X 10.8 stable package
Builder|Mac OS X: Use clang to build the 10.8 package

GCC is outdated on recent versions of OS X.