fixes in write_when_new

- create files with g/o read
- fix superfluos remove of tmpfile

install.py

@@ -248,8 +248,6 @@ def pip():
                         os.rename(tmpname, filename)
                     else:
                         os.remove(tmpname)
-                else:
-                    os.remove(tmpname)
             else:
                 print(pipcmd)
             # unix_cmd(pipcmd, doit, stdout=None)
@@ -290,6 +288,7 @@ def write_when_new(filename, content, as_root=False, ignore_reduction=False):
                 fil.write(content)
                 fil.flush()
                 unix_cmd('cp', fil.name, filename, sudo=as_root)
+                unix_cmd('chmod 0644', filename, sudo=as_root)
         else:
             unix_cmd('rm', '-f', filename, sudo=as_root)
     elif more_info: