Giving users control over min/maxIncluded for axis titles by including them into SideTitles (addresses #906)

[sczesla]

Including titles (labels) for the minimum and maximum data value is sometimes not desirable (see #906). The iterateThroughAxis routine (in axis_chart_helpers.dart) provides the logic for optional inclusion of the minimum and maximum already. This PR gives users control over these flags by incorporating them into SideTitles.

[imaNNeo]

You haven't used the properties that you defined. I think you need to add them here.
Also, please read the contribution guideline carefully, you need to write unit-tests

[sczesla]

Thanks for the feedback!

You haven't used the properties that you defined. I think you need to add them here.

I don't think so. Your link points to the defaults. The values are being used, possibly overwriting those defaults , when iterateThroughAxis is called here

Also, please read the contribution guideline carefully, you need to write unit-tests

Right. I added a test of the effect of setting the parameters when plotting, fixed formatting issues, edited the CHANGELOG, and rebased.

Cheers