Update README.md

Domain was missing in the username while binding
Merge branch 'develop' into 'master'
Release version 0.2.1
Release update 0.2.2
Enhance README
[fix] The schema cache files should be stored in lowercase filenames to ensure full compatibility
[fix] Correct logic introduced in 0585fcd ( adding non-DN values to an attribute got broken )
[fix] Correct conversion of ldap timestamps, again... ( pwdLastSet, accountExpires etc. )
Update changelog for 0.2.3
Update README for 0.3
Update changelog for 0.2.3
Update changelog for 0.3
Release version 0.3