ISIS-537: standardizing on use of CssClassFa facet value throughout (always include the "fa " class).
ISIS-928: minor bug fix in ToDoItemSubscriptions.
ISIS-928: marked Exploration annotation as deprecated, with a view to perhaps removing in Isis 2.0.
ISIS-703: new LabelAt annotation and facet and facet factories.

Also moved some of the fallback facets to same package as FallbackFacetFactory.
ISIS-537 Extract common markup in the parent classes (WIP)
ISIS-537 Further simplification of ScalarPanels' markup. Use inheritance and fragments to reduce the number of the HTML files to minimum
ISIS-537 Improve the markup of ReferencePanel and IsisBlobOrClobPanelAbstract
ISIS-537 Fix the comment about CSS region. The rules are about making the label on the left, not right
ISIS-537 Use <ul> for the additional links in AdditionalLinksPanel. Add some space at the bottom to draw a line between them
ISIS-537 Remove commented out CSS rules about colors in CssMenuPanel.css
ISIS-537 Remove "display: inline-block" for .dropdown-menu>li>a.menuLink" so that the hover colors the whole line
ISIS-537 Fix the javadoc of CssClassFaFacet
ISIS-537 Use bg-warning for prototype application actions
ISIS-537 Use btn-warning for prototype CssMenuItems (links) and btn-default for non-prototype

The size comes from our CSS (.entityActions .cssMenuPanel .menuh a:link), so there is no need of btn-sm