Use registry policy for WIP4278

Registry-based policy works for all supported Windows platforms and
requires no separate tools and very little new code.
Fix spelling and change policy path
Announce that source code moved to GitHub.
Move WiX Website Api to TinyWebStack.
Publish Global.asax file to get TinyWebStack wired in at runtime.
Add direct reference to Munq since .csproj doesn't resolving it through TinyWebStack.dll.
Add Munq to package dependencies.
Upgrade to TinyWebStack v0.1.1 to take advantage of new functionality.
Move handlers into their own namespace to clean up the root.
Add GitHub authorization for signing assignment agreements.
Rename 'sign' to 'request' in Assignment Agreement workflow.
Update WIP4299 to be in sync with its feature request.
Draft of WIP4337
Rewrite "Developing for WiX" on wixtoolset.org to, among other things, point to new automagic assignment agreement.
Pull request feedback
Update repo/branch instructions to GitHub structure
New WiP

WiP to allow Pyro to ignore empty wixmsts and still create a valid
patch.
Use web activator instead of Global.asax.
Update to latest dependencies to fix some issues in site.
Update web Pull target to get files from new WiX storage account.