fix readme, increase version number in debian/changelog, fix dependency list in debian/control

Author: brummer10

README.md

@@ -65,8 +65,9 @@ This repository contain the following extra GxPlugins as submodules.
 the following packages are needed to build the GxPlugs:
 
 - libc6-dev
-- libgtk2.0-dev
-- libstdc++6-dev
+- libcairo2-dev
+- libx11-dev
+- x11proto-dev
 - lv2-dev
 
 note that those packages could have different, but similar names 

debian/changelog

@@ -1,3 +1,9 @@
+gxplugins (0.5) unstable; urgency=medium
+
+  * Switch to X11 based GUI's.
+
+ -- hermann <brummer@org>  Mon, 08 Oct 2018 06:05:53 +0200
+
 gxplugins (0.4) unstable; urgency=medium
 
   * Initial Release.

debian/control

@@ -2,7 +2,7 @@ Source: gxplugins
 Section: unknown
 Priority: optional
 Maintainer: hermann <brummer@web.de>
-Build-Depends: debhelper, libc6 , libcairo2 , libgcc1 , libgdk-pixbuf2.0-0 , libglib2.0-0 , libgtk2.0-0 , libpango-1.0-0 , libstdc++6 
+Build-Depends: debhelper, libc6 , libcairo2 , libx11-6, lv2-dev
 Standards-Version: 3.9.8
 Homepage: <https://github.com/brummer10/GxPlugins.lv2>