Removed the hard-coded margin from  domainFromValue

Also renamed the filenames for the dateTime and linear scales to match the name of the objects they produce
Merge pull request #167 from tlsim/seriesElementWidth

Add series element width function for sizing candlestick/ohlc bars.
Merge pull request #168 from ColinEberhardt/remove-hardcoded-margin

Removed the hard-coded margin from  domainFromValue
Revert "Add series element width function for sizing candlestick/ohlc bars."
Merge pull request #170 from ScottLogic/revert-167-seriesElementWidth

Revert "Add series element width function for sizing candlestick/ohlc ba...
rename seriesElementWidth to timeIntervalWidth, add to bar series and use d3.functor
Merge branch 'master' of https://github.com/ScottLogic/d3-financial-components into seriesElementWidth

Conflicts:
	components/series/candlestick.js
	components/series/ohlc.js
	components/utilities/timeIntervalWidth.js