fixes #6895 - add a config option that causes the image graphs to show the evolution within the selected period instead of the evolution across the last n periods
Refs #4512, fix regression in site selector css (width expands when expanding even though child elements do not expand).
Refs #4512, fix another regression, make sure placeholder elements have the right size/margin in site selector.
Updating UI test screenshots for siteselector regression fixes.
Allow plugins to place screenshots in unprotected artifacts folder when travis build finishes. Plugins should specify UNPROTECTED_ARTIFACTS=1 global var in .travis.yml.
Display correct diffviewer URL at top of UI screenshots travis build output when UNPROTECTED_ARTIFACTS is set.
Refs #6876, do not display non-UserSettings reports if other plugins are not loaded.
Fixes #6882, use mysql 5.6 in travis.
Try to avoid mysql has gone away erros on travis.
Merge pull request #19 from piwik/master

updating with the latest patches