ci: replace python-dev with python-dev-is-python3 and update python scripts to use python 3 (crosswire#1150)

Author: phyrik

.ci-build.yml

@@ -66,7 +66,7 @@ requires:
     - libxml2-dev
     - libxml2-utils
     - make
-    - python-dev
+    - python-dev-is-python3
     - swig
     - uuid-dev
     - uuid-runtime

help/C/figures/index_all_pngs.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 #Copyright (c) 2009 Simon Meers
 
@@ -84,5 +84,5 @@ def y_or_n():
 	p = Popen("gimp -ib -", shell=True, stdin=t)
 	p.communicate() #wait for completion
 else:
-	print "Conversion aborted."
+	print("Conversion aborted.")
 

src/examples/ipc_client.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 #Copyright (c) 2009 Matthew Talbert
 

ui/wscript_build

@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 # encoding: utf-8
 
 bld.install_files('${PACKAGE_DATA_DIR}', '*.png')