Update run.py & .gitignore for windows

- Update run.py to execute on windows as SIGQUIT is not available.
- Update .gitignore to ignore the generate .pyd files
Ref #300, #393

.gitignore

@@ -19,3 +19,5 @@ cocoa/autogen
 /qt/*_rc.py
 /help/*/conf.py
 /help/*/changelog.rst
+
+*.pyd

run.py

@@ -20,7 +20,12 @@ from qt import dg_rc
 from qt.platform import BASE_PATH
 from core import __version__, __appname__
 
-from signal import signal, SIGINT, SIGTERM, SIGQUIT
+# SIGQUIT is not defined on Windows
+if sys.platform == 'win32':
+    from signal import signal, SIGINT, SIGTERM
+    SIGQUIT = SIGTERM
+else:
+    from signal import signal, SIGINT, SIGTERM, SIGQUIT
 
 global dgapp
 dgapp = None