Updating core sdk to V1.2.0 & fixing XML comments for better intellisense support
Adding missing XML doc file in sample
Updating web.config to use mode based API endpoint configuration
Updating README with configuration instructions
Added Syntax Highlighting
Updating README - Moving NuGet installation instructions to wiki
Adding instructions for using permissions api
Adding custom configuration support for IPN messages
removed IPNListenerUrl from samples
updated stubs, Changelog.txt and version for 100 release