Added polish translation for "installer" extension
Small fixes in Russian translation

edit msgid "None".
Remove the need for the app root to be writable if the config already exists.
Fixes in Russian translation

Update the date strings
Update README.md

solves #66
Merge pull request #90 from damz/pr/root-writable

Remove the need for the app root to be writable if the config already exists
fixed redirect after installation
Merge pull request #81 from kubens/master

Added polish translation for "installer" extension, thanx @kubens
Merge pull request #87 from HostSpectr/localization

Small fixes in Russian translation