Fixed issue in development branch with tooltips not hiding the second time. Closes #1766. Related to #1728.
Fixed issue with plot background image not being used in exported images. Closes #1765.
Upgraded PhantomJS convert script and Java export-server
Updated readme files for exporting server
Partially fixed issue with blurred legend contents in PDF export. Issue #1782.
Merge remote-tracking branch 'origin/master'
Merge branches 'master' and 'master' of github.com:highslide-software/highcharts.com
Merge branch 'master' into stacking
Fix a bug when stacks wasn't updated after extremes change