added .kdbx as a valid v2 file extension
added requirement libkeepass 0.1.1
added requirement for lxml 3.2.1
updated libkeepass req to 0.1.2
added kdbx testfiles
updated backend tests to support keepass2 files
made test_get_backend pass
added keepass2 format support incl. unit tests
add support for create_login incl. unit tests
renamed camelcase variables
fixed some more camelCased variable names
adds a test to check error-free handling of non-ascii entries
adds a regression test for unicode handing
fixes exploding when db-field exists but is empty
another overseen camelCase removed
Put package requirements to setup.py
Better Makefile

Don't install development requirements for unit testing.
Apply renamed Makefile targets
Fixup dependencies link handling in setup.py

In Python 2.6 the setup.py got the keepass
dependency from PyPI and not from the source
which is definied in dependency_links in setup.py.
Disable Python 2.6 support temporarily