Update README.md

Added MyGet Build Status badge!

@xavierdecoster @maartenba very cool addition! :-)
Update README.md
Update README.md
(#91) Documentation

- Began adding in the core files for describing the ChocolateyGUI project
- This includes the COMMITTING AND COMMITTERS files, as well as LICENSE and NOTICE, and also a CHANGELOG
- Took all the release notes from here: http://chocolatey.org/packages/ChocolateyGUI and put them into CHANGELOG
- Just left LICENSE and NOTICE blank for now, until I get the nod from Rob to use exact same license as Chocolatey
(maintenance) Added license and notice info

- Using the Chocolatey License as a basis, added a license and notice file for ChocolateyGUI.
(Documentation) Updating Readme.md

- Added additional information about installation
- Corrected broken image link
- General update of entire readme
(Documentation) Update Readme.md

- Clearly I was a bit over zealous when hitting the delete key, and I broke the URL for downloading the latest alpha version of ChocolateyGUI.