add aash support for windows:
1.) two variants added to open a external shell window to run script.
2.) variant 1 is called by using "Ctrl-P" and typing...
3.) varinat 2 is called by using "Ctrl+Shift+B"
4.) the default Ctrl+B will run script in the Sublime's build console.
5.) variant 1 will run in external window and remains in the window after executed.
6.) variant 2 will run in externlly but 'press any key to exit...'