Unset executable bits & remove !#shebang (#306)

* Unset executable bit from XML and images

I'm not an expert, but those XMLs do not look like any kind of
normally executable scripts. And even if they were -- XML syntax does
not allow shebangs, as far as standard[1] is concerned.

[1]: https://www.w3.org/TR/2008/REC-xml-20081126/#NT-document

* Drop unused global var WINEASIO_PREFIX

It was mis-formatted anyway. Looks like a
copy-paste from wineasio which is broken in the
exact same way[1].

[1] 638ce56a7f/gui/settings.py (L41)

* Unset executable bit

Unset executable bit from all python sources upon installation

Makefile

@@ -159,7 +159,7 @@ install:
 	install -m 644 resources/scalable/claudia-launcher.svg $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps/
 
 	# Install main code
-	install -m 755 src/*.py $(DESTDIR)$(PREFIX)/share/cadence/src/
+	install -m 644 src/*.py $(DESTDIR)$(PREFIX)/share/cadence/src/
 
 	# Install addtional stuff for Cadence
 	install -m 644 data/pulse2jack/*     $(DESTDIR)$(PREFIX)/share/cadence/pulse2jack/

src/cadence.py

@@ -113,8 +113,6 @@ XDG_APPLICATIONS_PATH = [
     "/usr/local/share/applications"
 ]
 
-WINEASIO_PREFIX = "HKEY_CURRENT_USER\Software\Wine\WineASIO"
-
 # ---------------------------------------------------------------------
 
 global jackClientIdALSA, jackClientIdPulse