Do not compress manual pages and install them in the right place.
Fix "TypeError: write() argument must be str, not bytes" with Python 3
by decoding `manpage' properly.

Index: setup.py
--- setup.py.orig
+++ setup.py
@@ -20,7 +20,6 @@ import os
 import operator
 import subprocess
 import glob
-import gzip
 import datetime
 
 import docutils.core
@@ -100,20 +99,19 @@ class build_man(NoOptionCommand):
     def run(self):
         self.mkpath('build')
 
-        for (sourcefile, gzfile) in [
-                ('data/arandr.1.txt', os.path.join('build', 'arandr.1.gz')),
-                ('data/unxrandr.1.txt', os.path.join('build', 'unxrandr.1.gz')),
+        for (sourcefile, manfile) in [
+                ('data/arandr.1.txt', os.path.join('build', 'arandr.1')),
+                ('data/unxrandr.1.txt', os.path.join('build', 'unxrandr.1')),
                 ]:
 
-            if newer(sourcefile, gzfile):
+            if newer(sourcefile, manfile):
                 rst_source = open(sourcefile).read()
                 manpage = docutils.core.publish_string(rst_source, writer=docutils.writers.manpage.Writer())
-                info('compressing man page to %s', gzfile)
+                info('writing man page to %s', manfile)
 
                 if not self.dry_run:
-                    compressed = gzip.open(gzfile, 'w', 9)
-                    compressed.write(manpage)
-                    compressed.close()
+                    with open(manfile, 'w') as fh:
+                        fh.write(manpage.decode('utf-8'))
 
 class update_translator_credits(NoOptionCommand):
     description = 'Examine the git history to produce an updated metadata file.'
@@ -218,7 +216,7 @@ class clean(_clean):
     def run(self):
         if self.all:
             dirs = ['build/locale']
-            files = ['build/arandr.1.gz', 'build/unxrandr.1.gz']
+            files = ['build/arandr.1', 'build/unxrandr.1']
             for directory in dirs:
                 if os.path.exists(directory):
                     remove_tree(directory, dry_run=self.dry_run)
@@ -259,7 +257,7 @@ setup(name = PACKAGENAME,
             },
         data_files = [
             ('share/applications', ['data/arandr.desktop']), # FIXME: use desktop-file-install?
-            ('share/man/man1', ['build/arandr.1.gz', 'build/unxrandr.1.gz']),
+            ('man/man1', ['build/arandr.1', 'build/unxrandr.1']),
             ],
         scripts = ['arandr', 'unxrandr'],
 )