* Added valgrind to container and updated sample and README to show example of checking for memory leaks
* Updated sample and README to include Visual Studio usage, removed unnecessary lines
* Fixed builds of existing samples by removing the deprecated azsphere_configure_tools and azsphere_configure_api
* Add AzureSphereSquirrel to excludes since it uses the broken DEBUG_LIB feature
* Missing comma
Jonathan Phippen
Chris Whitworth