Make username case insensitive
Merge pull request #501 from owncloud/no_case_sensitive_log_in

Make username case insensitive
[tx-robot] updated from transifex
[tx-robot] updated from transifex
[tx-robot] updated from transifex
Merge branch 'develop' into more_concrete_error_messages_session_expires
New class ErrorMessageAdapter to choose proper error message to show to the user depending on the results of operations
Add specific message(s) for network error(s) in strings.xml