Fixed #3004, image export not working with Google Spreadsheets data loading.
Added new default behaviour for the xAxis.minTickInterval option on datetime axis. It now goes to the closest point range by default.
Fixed #3152, tooltip didn't display on the far left of a zoomed axis with categories.
Closes #3416 broken tooltip on colorAxis
Highmaps: Fixed #3190, reversed color axis displaying the wrong gradient.
Added hover with full copyright text to map credits
Fixed #3418, wrong default tooltip header date format when passing points every two days, two months etc.
Implemented algorithm for setting precise tooltip xDateFormat when needed, but general format like year, month, day etc. when the time falls on midnight and the closest point range dictates it. Related to #3329.
Allow decimals in axis height and top percentages.
Merge remote-tracking branch 'upstream/master'