Altered:
- Moved private member variables for widget
ui_AMExporterOptionGeneralAsciiView.h to
AMExporterOptionGeneralAsciiView
- Moved initialization code from ui_AMExporterOptionGeneralAsciiView.h
to AMExporterOptionGeneralAsciiView::AMExporterOptionGeneralAsciiView()
Removed:
- AMExporterOptionGeneralAsciiView.ui

Altered:
-AMExporterOptionGeneralAsciiView ~ Changed some of the variable names
for the widgets that escaped the first set of changes.
Altered:
- AMExporterOptionGeneralAsciiView::AMExporterOptionGeneralAsciiView() ~
Changed default displated tab to be "Data Sets" (index 1)
- AMExporterOptionGeneralAsciiView.h ~ Moved member variables from
private to protected
Added:
- AMExportController::scanFromUrl() ~ Function which takes a scan URL
and returns the scan (or 0 if no scan can be loaded from that URL)

Altered:
- AMExportController::AMExportController() ~ Now both constructors
determine the default export option by checking the default for the
first scan. (Assumes that all the scans are the same as the first one)
- AMExportWizardOptionPage::populateOptionSelector() ~ Now selects the
option for the combo box depending on the export controller's current
default option.
Fixed minor merge conflict. Removed annoying direct use of pragma warning system in AMExporterOptionGeneralAsciiView.h
Merge pull request #855 from acquaman/Issue854

Fixed one minor merge conflict with master. Tested. Builds and appears to be working for exporter.