Fix incorrect documentation URL

Perturbing the nodes was being performed on all nodes regardless of whether they were set as fixed.

fix known security issue with handlebars version

Added a "showLegend" option which can be used to toggle legend drawing
Added legend drawing to 11_tooltips and to playground examples
Added description of showLegend option to documentation

Signed-off-by: André Martins <aanm90@gmail.com>

It was broken by PR (#1729), which fixed issues #112 & #1730.
As far as I can tell that change shouldn't influence the DataAxis (vertical-axis), but only the horizontal axis.

 @yotamberk can you check if your examples still work as expected?

Set content width to avoid overflow (Fix #1853)

reset switched{Day,Month,Year} in next function, not in isMajor function

BugFix - Network.options.nodes

Fixed updating directions of the arrows with the string type

As the documentation on vis.js nodes can be styled with align: left|center

allOptions does not include this option and throw an error on option validation.

`vis-network.min.js`, and `vis-timeline-graph2d.min.js`