refs #4987 started to work on piwik zen mode, will improve widgets later... still in exploration mode but is already pretty nice to use
refs #4987 added tooltip and some translations
refs #4987 the zen mode directive is no longer needed, at least for now
Added possibility to modify twig templates in own theme.
Theme templates can be overridden by placing them in plugins/[theme]/templates.
Plugin-templates can be overridden by placing themb in plugins/[theme]/templates/plugin/[plugin]/
Merge remote-tracking branch 'origin/master' into 4987_zenmode
refs #4987 added possibility to search for websites
refs #4987 tweaked some reports, remember whether zenmode is enabled/disabled, code improvements
refs #4987 fix the quick access menu selection did not always work and update selected item on mousemove
refs #4987 make sure to not display footer icons by default
refs #4987 some code improvements, added shortcuts and more tweaks
refs #4987 show footer icon drawer if not in dialog
refs #4987 apply some of the zenmode styles by default and not only in zen mode. Will move the content of CoreHome/stylesheets/zen-mode.less to other files later
refs #4987 some bugfixes especially for small windows, fixed a test, enabled plugin
refs #4987 added missing file, make sure footer icons for user country is always displayed
Merge pull request #268 from piwik/translationupdates

[automatic translation update] Updated 155 strings in 8 languages (de, es, et, fi, hi, nl, sl, sv)
Fixes #4990 Removing use of sessions during installation.
Removed installation step 'databaseCheck'
Factored out the System check in its own class
(The 3 strings keys were removed from otrance)
Refs #4990  remove Protocol section from system check
2.2.1-b2
Removed outdated translation key
Maybe this fixes the Installation screenshot tests? http://builds-artifacts.piwik.org/ui-tests.master/2600.1/screenshot-diffs/diffviewer.html