language update  refs #3430
Merge pull request #168 from piwik/translationupdates

[automatic translation update] Updated 443 strings in 6 languages (ca, de, el, fi, it, nl)
Fix loading/Done! text not showing in geolocation settings w/ morpheus.
Show disabled radio buttons/checkboxes with grey background color in morpheus.
refs #4280 created a travis.yml that allows plugin developers to run their tests on travis
Piwik 2.0 is here. Wow!
Adding to README the travis icon for the screenshot tests build
fixes #4373, #1640