fixing default configuration for AD

fix authentification for AD backend

more encoding error fix (on ldap auth)

adding utf-8 char in unit tests for ldap backend

more encoding fixes

fix more encoding error

edit default configuration to take into account AD backend

fix rename in modify ...

when renaming an entry, dn must be reset to the correct value for
the modifications that come after the rename.

many fixes in encoding handling

removing utf-8 crap in AD backend ...

the crap must be fixed in LDAP backend first

fix encoding error on dn

fix pep8 compliance

typo + add/del group in AD backend ...

* implementing add_to_group and del_from_group in AD backend.
* fixing typo self.objetclasses => self.objectclasses

making Backend skeleton a child class of object ...

this enables the use of super()

Better exception re-raising ...

re-raising the exception without specifying the exception object gives
exactly the previous exception (including the correct stacktrace)
which is nicer to have for debugging.

implementing renaming entry

fix recovery of groups in AD backend

adding filter for ad backend

fix search template for AD backend

fix unit tests

Merge branch 'master' of https://github.com/kakwa/ldapcherry

renaming and begining implementing the ad backend

adding more debug traces in case of a faulty backend

adding fork me banner

fix pep8 compliance

add badges to README

fix classifiers

fix typos

better css for documentation

fix docstring in ldapcherry/backend/__init__.py