MediaElement.swf Flex build

We've created a Flex build for the flashmediaelement.swf using the free Flex SDK available from Adobe.

This required a few changes and includes a couple nice-to-haves:

- Clean up all warnings about undeclared types and function return values so it will compile in strict mode (except for YouTube - see the build.sh file)
- Create a global mediaElementDisplay symbol in the FLA file and export it for actionscipt
- Change the FLA publishing process to out put a SWC instead of a SWF
- Declare, instantiate and and add the mediaDisplayElement to the stage in FlashMediaElement.as
- Include a build.sh script that builds the SWF under the /src/flash directory
- See the build.sh script for information on downloading and installing the free Flex SDK.
- Create a symlink flex_sdk_4_6 in the src/flash directory that points to /usr/local/flex_sdk_4_6
- Build a debug and a non-debug version of the SWF file
- Convert DOS CR line-endings in all .as files with Unix LF endings so git will be able to show diffs (Please, do not use the Flash IDE to edit the .as files!)
- Change all tabs to 2 spaces in the .as files
- See the build.sh script for instructions on building the SWF

/dave