templates/about: Improved layout and added more information
templates/about: Added banner image
templates/about: Modified welcome text
templates/about: Use id="about" instead of "getting_started"
templates/about: Added social buttons
templates/about: Added links to tracking and database headers
templates/about: Added icons to external links
views: Let / route serve the about page
Merge pull request #87 from Turbo87/about

Improved "About" page
i18n: Updated messages.pot template file
templates/about: Adjust column layout for lead line
style.css: Made "(planned)" labels smaller

.. to fit longer headlines in translations
i18n: Updated German translation
Merge pull request #88 from Turbo87/i18n

Updated translations
scripts: Updated launchpad/import_archive.py with new paths
i18n: Updated German translation
tests: Fixed test_i18n unit test

New paths since flask port
i18n: Updated Russion translation
i18n: Updated Polish translation
Merge pull request #89 from Turbo87/i18n

Updated translations from launchpad