Issue #141: encoding error with hg repo and umlaut (conservancy/kallithea)

[Adi Kriegisch]

New issue 141: encoding error with hg repo and umlaut
https://bitbucket.org/conservancy/kallithea/issue/141/encoding-error-with-hg-repo-and-umlaut

Adi Kriegisch:

The error is either triggerable by running 'paster make-index production.ini' or by browsing the files in the repo:

```
#!python

Traceback (most recent call last):
  File "paster", line 9, in <module>
    load_entry_point('PasteScript==1.7.5', 'console_scripts', 'paster')()
  File "(...)/lib/python2.7/site-packages/paste/script/command.py", line 104, in run
    invoke(command, command_name, options, args[1:])
  File "(...)/lib/python2.7/site-packages/paste/script/command.py", line 143, in invoke
    exit_code = runner.run(args)
  File "(...)/lib/python2.7/site-packages/kallithea/lib/utils.py", line 753, in run
    return super(BasePasterCommand, self).run(args[1:])
  File "(...)/lib/python2.7/site-packages/paste/script/command.py", line 238, in run
    result = self.command()
  File "(...)/lib/python2.7/site-packages/kallithea/lib/paster_commands/make_index.py", line 84, in command
    .run(full_index=self.options.full_index)
  File "(...)/lib/python2.7/site-packages/kallithea/lib/indexers/daemon.py", line 451, in run
    self.update_indexes()
  File "(...)/lib/python2.7/site-packages/kallithea/lib/indexers/daemon.py", line 443, in update_indexes
    self.update_file_index()
  File "(...)/lib/python2.7/site-packages/kallithea/lib/indexers/daemon.py", line 390, in update_file_index
    i, iwc = self.add_doc(writer, path, repo, repo_name)
  File "(...)/lib/python2.7/site-packages/kallithea/lib/indexers/daemon.py", line 175, in add_doc
    node = self.get_node(repo, path, index_rev)
  File "(...)/lib/python2.7/site-packages/kallithea/lib/indexers/daemon.py", line 163, in get_node
    node = cs.get_node(node_path)
  File "(...)/lib/python2.7/site-packages/kallithea/lib/vcs/backends/hg/changeset.py", line 352, in get_node
    % (path, self.short_id))
kallithea.lib.vcs.exceptions.NodeDoesNotExistError: There is no file nor directory at the given path: '�berblick_Machbarkeitsstudie.doc' at revision XXX
```

The filename itself decodes fine with either latin-1 or latin-2:

```
#!python

>>> l=os.listdir(".")
>>> l
['.hg', '\xdcberblick_Machbarkeitsstudie.doc']
>>> print l[1]
berblick_Machbarkeitsstudie.doc
>>> chardet.detect(l[1])
{'confidence': 0.8991773543668901, 'encoding': 'ISO-8859-2'}
>>> print l[1].decode('ISO-8859-2')
Überblick_Machbarkeitsstudie.doc
```

anything else you need that might help at debugging?