add log message MOAI_FileOpenError_S

While this may seem redundant with MOAI_FileNotFound_S, there
may be cases where the file exists but can't be opened, e.g.,
due to permission errors. This also supports a safer code structure:
actually try to open the file and log if it fails, instead of checking
for file existence and then just assuming it will open.
use MOAILogMessages::CheckFileExists instead of USFileSys::CheckFileExists so we get an error message
Log if file didn't open successfully
check and log if sound file doesn't exist

I would have preferred to check whether the actual file-open
operation succeeded, but this would require adding a check inside
untz itself, which doesn't have a clear logging mechanism at
the moment.
- Camera support for iOS on moai
- Fixed not dimissing picker
Fixing build errors for DataTaskIO
fix: MOAIImageTexture not override OnInvalidate
Merge pull request #619 from antback/master

Initial Camera Support for iOS
Merge pull request #618 from tommo/bug-fix

fix: MOAIImageTexture not override OnInvalidate
Merge pull request #592 from sporksmith/log-file-open-fails-pull-req

Log file-open failures
Fixing issue with setting visibility not properly updating dependencies
Fixed VSYNC issue for OSX host.
Merge pull request #621 from clementfarabet/master

Fixed VSYNC issue on OSX.
VSYNC fix is for Apple only.
Merge pull request #622 from clementfarabet/master

VSYNC fix is only for OSX.
[Fixed Bug] NaCl won't build

Due to some commits NaCl Broke.
Here are some changed needed to make it work again.

Moved US* to MOAI* as in moai/moai-dev@9c39f367f3bd26d6c3c9ccf0d636c85338cdcfa9
Added MOAITaskQueue and MOAITaskSubscriber as in moai/moai-dev@c8c863f511ee43626fa1935b3176e39f65f002c1
Removed MOAIData.cpp since was deleted in moai/moai-dev@e682da1ae8b93deccee6e03ceac0cc3c19f415a2
Removed MOAIDataIOAction.cpp since was deleted in moai/moai-dev@c8c863f511ee43626fa1935b3176e39f65f002c1
Sorted commas to match a single column.
[Fixed Bug] Visual Studio 2010 won't build

Due to some commits Visual Studio 2010 build broke.
Here are some changed needed to make it work again.

Moved US* to MOAI* as in moai/moai-dev@9c39f36
Added MOAITaskQueue and MOAITaskSubscriber as in moai/moai-dev@c8c863f
Removed MOAIData.cpp since was deleted in moai/moai-dev@e682da1
Removed MOAIDataIOAction.cpp since was deleted in moai/moai-dev@c8c863f
Added initial CMake build system for Linux.

Added Linux build files for box2d, chipmunk, expat, freetype and moai.
Normalized line endings in some files.
Added CMake build scripts for more libraries.

Added build script for Glew library.
Added build script for Jansson library.
Added build scripts for GlewInfo and VisualInfo binaries.
Added build scripts for CURL and ARES.