Bump dependencies to U14.04, drop Fedora 20

Fedora 20 is too old: GLib 2.38 and GTK+ 3.10. By dropping support for
Fedora 20, it is possible to raise dependencies to GLib 2.40
(Ubuntu 14.04) and take advantage of new goodies :-)

Issue: tiliado/nuvolaplayer#144

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>

README.md

@@ -22,9 +22,9 @@ Dependencies
 
   - Python 2 or 3 to run ./waf
   - Python 3 to run ./testgen.py
-  - glib-2.0 >= 2.38
-  - ghread-2.0 >= 2.38
-  - gio-2.0 >= 2.38
+  - glib-2.0 >= 2.40
+  - ghread-2.0 >= 2.40
+  - gio-2.0 >= 2.40
   - gtk+-3.0 >= 3.10
 
 Build

wscript

@@ -33,7 +33,7 @@ APPNAME = "diorite"
 VERSION = "0.1.0+"
 SERIES = VERSION.rsplit(".", 1)[0]
 
-TARGET_GLIB_TUPLE = (2, 38)
+TARGET_GLIB_TUPLE = (2, 40)
 TARGET_GLIB = '{}.{}'.format(*TARGET_GLIB_TUPLE)
 TARGET_GTK_TUPLE = (3, 10)
 TARGET_GTK = '{}.{}'.format(*TARGET_GTK_TUPLE)