Enable stacked scales and with reverse option support

[stockiNail]

Fix #652

This PR is changing the defaults of yMin/Max options when missing.
It applies the same logic was implemented in the plugin version < 1.

It adds the control of the scale reverse options and stacked scales.

Recap about which locate methods is affected:

Name	Scale Options	Values options	Stacked Scales	Reverse Scales
box	xScaleID, yScaleID	x/yMin, x/yMax	Yes	Yes
point	xScaleID, yScaleID	x/yValue	Yes	No
line	scaleID	value, endValue	No	No

[stockiNail]

@kurkle the stacked scales support is forcing us to change all functions used to get the location of annotations (not only the box ones) because the default dimension is not the chart area anymore but scale one.
Furthermore, the chart area is also used in some drawing phase to check if inside or not and also this part must be re-evaluated.
Therefore this PR needs additional updates

[stockiNail]

Working on line annotation, I have recognized that the line annotation is working slightly different comparing with the other annotation when the location of the annotation is using x/yMin and x/yMax.
I wanted to use the helpers to get a rectangle on the chart (as used for all other annotations) but I have seen that it could work but this changes the current behavior of the line annotation.

Currently the x,y properties of line annotation element couldn't reflect the top,left of the box. The same for x2,y2 which couldn't be the bottom,right. This is because the properties are not checked and the line can be drawn correctly as well.

But x,y (and x2,y2) element properties are used by the sub elements of the annotation for the their position (label, arrow heads).

When #532 will be implemented, this could be taken care, because this could change significantly the chart rendering.