Updates to the README and build process.  This includes the following changes:

- Use a simple HTTP server when testing out Flash.  Given wacky security settings, Flash can sometimes not behave as you expect when running locally.
- Build from Apache Flex.  This is the latest version of the SDK and more open source friendly.
- Recent changes in Apache Flex allow another change, which is to target an earrlier version of the Flash Player, 10.3.  There's nothing in use that requires the targeting of Flash Player 11- this was just forced on all projects with the last version of the Adobe SDK.
- Make the bin-debug folder (for IDE use) and bin-release folder (for shell use and final bit building) easier to use by populating them with a demo file that works and files in video.js
- Remove old VideoJS.swfs that aren't in use.  (They were old, definitely not the latest version.)
- Don't make anyone change build.sh
Fix bash formatting in README
File that should have been removed in earlier commit
Fixed demo file and added messaging to setup.sh
Added the steps to download the playerglobal.swc to the setup.sh script
Added some general bullet-proofing to the setup.sh script
Removed the playerglobal.swc download steps from the README.md

Testing:
tested setup.sh with no arguments - printed usage information
tested setup.sh with valid video_js_dir and flex_sdk_dir - script completed successfully
tested setup.sh with only a valid video_js_dir - script complained that it couldn't find the flex_sdk_dir
tested setup.sh with only a valid flex_sdk_dir - script complained that it couldn't find video.js at flex_sdk_dir
tested setup.sh with only a invalid video_js_dir and valid flex_sdk_dir - script complained that it couldn't find video.js the video_js_dir
tested setup.sh with valid video_js_dir and flex_sdk_dir - script completed successfully
Added download of playerglobal.swc to setup.sh
Added some bulletproofing to setup.sh
Removed download steps from README.md

Fixed some merge conflicts with setup.sh
Update README.md
Update README.md
Remote the last of the TODOs from the README and scripts.  Look over all of the recent changes again and make a few more tweaks
Fixed a typo, and corrected some grammar.
Added the --silent flag to the cURL command, to clean up the console output.
Added a contrib guide, which includes some setup, testing and bug filing guidelines
Removing the contrib guide from this repo; will add it to a separate branch of the main repo.
Merge pull request #23 from bdeitte/master

Updates to the README and build process