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Merge branch 'master' of https://github.com/jarey/jcommune.git
[JC-1874]- Notification messages in unsuccessful attempt to login to the
application have been changed in order to be more friendly to the user,
letting him/her know the exact problem.

Messages were changed to the 4 languages of the app, (Russian, Ukranian,
English and Spanish) according to the texts pointed in the Jira task.