Implemented: the Actions only for a specific configuration

* Closed Issue #16
* Introduced the IEnvironment as layer for work with the DTE-enviroment and for other similar
** The Environment implemented this as main worker. In general, main logic splitted from MSBuildParser.
* Config no longer static now.
* UI.EventsFrm contains logic for #16 and #18
* #18 partially prepared:
** The bindProjectPre() & bindProjectPost() currently throws exception as a "not yet implemented"
Changes with ISBEParserScript