simple refact namespace to Events/Actions
Changes with the DTE-Commands:

* Now supported arguments - Issue #15
** arguments parsed as is - raw-line for "CommandArgs"
   /see MSDN: http://msdn.microsoft.com/en-us/library/envdte._dte.executecommand.aspx

* Refactored structure to DTEOperation & basic tests for that
** accordingly removed SBEQueueDTE

* Exceptions moved into net.r_eg.vsSBE.Exceptions