* [html2] Clean up namespace issues in code samples
* pull c# and php package namespace from --additional-properties arg
phpInvokerPackage arg now sets the PHP namespace and packageName sets
the CSharp namespace. invokerPackage still works for Java and Android
namespace.
* Newline escaping disabled
Newline escaping disabled for HTML and HTML2 generators. Escaping
failing Markdown processors to work correctly on descriptions
* HTML examples updated
* added method summary under the method name
* added batch file for html2 generation on windows
* regenerated html2 example
* changed the html2 windows batch to use yaml instead of json and regenerated sample
* fixed encoding issues
