Merge branch 'upstream' into develop
Added jsdocs for Axis.tickFrequency
Fix for tick colour/font not being applied

The d3 -> self.axisElement is because on a page with multiple charts, d3
styles *everything*, while self.axisElement only styles the chart we are
trying to change.
Response to review comments

Stating 'distance between tick *values*'
Added note that tickFrequency doesn't affect ordinal axes
Added @link to insight.DateFrequency
Merge pull request #227 from niksoper/tickfreq-docs

Added jsdocs for Axis.tickFrequency
Merge pull request #228 from tpkelly/develop

Fix tick colour/font
Merge branch 'upstream' into develop
Add configurable tick marks

Adds control over the line width and colour of tick marks.
Trivial updates to jsdocs

Table.dataset: memberof! insight.Table
Included PointSeries in jsdocs
Added @instance to Chart.seriesChanged
Merge pull request #231 from niksoper/trivial-jsdocs

Trivial updates to jsdocs
Respond to review comments

Fixes the docs of the new methods, and the type of the new theme properties
Merge pull request #229 from tpkelly/develop

Configurable tickmarks
Merge branch 'develop' of https://github.com/ScottLogic/insight into rename-theme-props

Conflicts:
	Changelog.txt