refs #6564 refactored out HtmlMessageException and introduced some other exceptions instead
refs #6665 fix missing translation key in websites management
language update  refs #3430
Merge pull request #6668 from piwik/translationupdates

[automatic translation update] Updated 179 strings in 7 languages (fr, nl, cs, el, da, de, it)
refs #6662 ignore less files when using Piwik via bower
Merge pull request #6587 from piwik/removeHtmlMessageException

Refactor out HtmlMessageException
Merge branch 'master' into di-config

Conflicts:
	core/FrontController.php
Merge branch 'di-config' into tmp-path

Conflicts:
	core/Session.php