Refactor - use PropertyView/WidgetView

[pawel-soja]

The main goal is to get rid of the use of direct access to fields defined in indiapi.h and the use of getters/setters via PropertyView/WidgetView.
It will also make it easier to switch to high-level INDI::PropertyXXX.

In addition, I added typedefs to make the names friendlier, and in the future, it could be easily replaced with full-fledged classes.

indi/libs/indidevice/property/indipropertyview.h

Lines 38 to 48 in 3f172f6

	typedef PropertyView<IText> PropertyViewText;
	typedef PropertyView<INumber> PropertyViewNumber;
	typedef PropertyView<ISwitch> PropertyViewSwitch;
	typedef PropertyView<ILight> PropertyViewLight;
	typedef PropertyView<IBLOB> PropertyViewBlob;
	typedef WidgetView<IText> WidgetViewText;
	typedef WidgetView<INumber> WidgetViewNumber;
	typedef WidgetView<ISwitch> WidgetViewSwitch;
	typedef WidgetView<ILight> WidgetViewLight;
	typedef WidgetView<IBLOB> WidgetViewBlob;

[knro]

Quite impressive!! I applaud you for taking the time to do this. I think from now on, I will not accept MRs for new drivers that use the old-style INDI properties.

[pawel-soja]

Hey thanks! Finally, I want to mark a couple of methods as deprecated and that there will be no warnings related to this in this repository.