GWT-689: user should not provide full getCapabilities url for adding WMS and WFS layer. Test driven creation of full getCapabilities url.
implement WizardUtil methods for creating full getCapabilities url to WizardViews. Make common abstract class for the Wms and WfsCapabilities step.
GWT-689: remove reference to java.net.URL: cannot be used client-side. Used blunt methods to separate base from query url
Merge pull request #90 from geomajas/GWT-689_GetCapabilitiesUrlSimplification

GWT-689: user should not provide full getCapabilities url for adding WMS...