* moved SourcetrailPlugin to separate GitHub repository: https://github.com/CoatiSoftware/vs-sourcetrail
* changed Readme in ide_plugins folder to point to that repo and give instructions on how to install
* removed vsix from windows package
* renamed SourcetrailPlugin project to SourcetrailExtension
* changed assembly name to vs-sourcetrail
* removed plugin install script because the tests now use a configured experimental instance of Visual Studio
* added license file for cinder solution that is used in plugin integration tests
* replace license file with apache license
* added boilerplate notice of Apache License 2 to source files of plugin
malte_langkabel
b4166be89b