Documentation|Console: Added (de)activebcontext, cleaned up help output

Added macros for basic structure (Usage, Examples, See also).
Documentation|Console: Added "listbcontexts"

Removed the obsolete "listbindclasses".
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.
Documentation|Console: Fixed typos
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GCC is outdated on recent versions of OS X.
libdeng2|FS: Improved interface for file creation

Instead of a simple bool flag, use an enum for the behavior when
creating new files.
libdeng2|App: Added -reset for emptying persist.pack to defaults

The new command line option "-reset" will delete persist.pack causing
all persistent data to be lost, effectively restoring the engine to
"factory defaults".

In the future this can be used to reset all console variables as well
(and all other persistent state) since they will be stored in the
Config.
Bumped version to 1.11, changed release type back to "Unstable"
Documentation: Instructions for adding new versions of public APIs
Merge branch 'master' into mapdata-c++