fix setup.py install script which compiles and copies translations in the correct order

pisi/__init__.py

@@ -19,7 +19,7 @@ import logging
 import logging.handlers
 from importlib import reload
 
-__version__ = "3.0a1"
+__version__ = "3.0.0-alpha1"
 
 __all__ = [ 'api', 'configfile', 'db']
 

setup.py

@@ -104,7 +104,7 @@ class Install(install):
                 continue
             lang = name[:-3]
             print("Installing '%s' translations..." % lang)
-            os.popen("msgfmt po/%s.po -o po/%s.mo" % (lang, lang))
+            os.system("msgfmt po/%s.po -o po/%s.mo" % (lang, lang))
             if not self.root:
                 self.root = "/"
             destpath = os.path.join(self.root, "usr/share/locale/%s/LC_MESSAGES" % lang)