fixed ios iframe reload bug
upgraded to font-awesome 4.2.0
pulled new translations from crowdin
removed plugin analytics-piwik from core

the plugin now lives in its own repository at this url:
https://bitbucket.org/jpp-cologne/plugin-analytics-piwik
added new file, part of font-awesome
updated license copyright
fixed pie-chart animation bug in firefox
guess number format if user hasn't specified any
use full number format after updating the chart
this fixes the bug that text prepended or appended to numbers
disappears after updating the chart
update axis labels on chart updates in column charts