Using x2axis/y2axis to add a second axis is deprecated, but we
currently still support it.  Historically we’ve just extended the first
axis’s options with the second’s, but that is a problem when the first
has min/max and the second doesn’t; it will inherit an inappropriate
min/max.

We might want to consider not extending at all, but since that’s a
bigger change we’ll for now just ensure that if no min/max is
specified, we respect that.

Fixes #1228.

Improve the performance of large data processing

Pie: Fix combined data to keep all other original values.

But not only data, color, label, angle, percent as was before.
Allows to store own values in series and use them e.g. in labelFormatter.

Make dateGenerator publicly accessible.

Proposed fix for issue 1204: only enforce zoom limits in the direction of the merge

Fixes #1210.

This was accidentally introduced by #1200; we can’t assume that
axis.ticks is an array.

Don't add padding when there's no last tick.

Default lineHeight based on the font size.

Distinguish between the first and innermost axis.

Flot 0.8.0 used the default font size, typically derived from the
placeholder, as the basis for the default lineHeight.  This produced
incorrect results when a font.size was provided explicitly, and it
differed from the placeholder’s CSS size.

Fixed by waiting to default lineHeight until the actual font size has
been resolved.  Fixes #1131.

Flot 0.8 added logic to account for the size of axis tick labels and add
padding around the edges of the plot, to prevent long labels from
sticking out.  But it padded both sides equally, which is incorrect if
the right/top side has no last axis label.

Fixed by allocating padding per-side, and checking whether the last
label would be shown before padding the top or right.  Fixes #1048.

The fix for #1056 caused a regression where grid lines were drawn for
the innermost axes on both sides instead of just the first axis.
Fixed by properly distinguishing the first axis in each direction from
the innermost one on each side.  Fixes #1075.

Added plot.destroy() method, to properly destruct and release memory of plots.

:not(selector , selector) isn't actually a valid CSS selector

jQuery's Sizzle is the only thing that this actually works in so jQuery will fail when it passes this directly to querySelectorAll()

Add Ruby examples

Fixed a bug where plotting a chart crashes if the placeholder doesn't have a font size

Fixed Issue #1159 - Bug Redrawing Legend when using custom container

fix label's maxWidth calculation