CodeSnip Old Code (SVN)

Removed compiler directives that switch off "unsafe" code, type and cast warnings. These warnings are now disabled globally for the whole project.

Reimplemented tree view building code to use TGrouping and TGroupItem classes and descendant classes to group snippets as required before creating the required tree views.

New abstract base class for frames that display categorised snippets in a tree view where each snippet or whole category of snippets can be selected by means of check boxes. Code was derived from that formerly in FrSelectSnippets unit. Subclasses must override methods that determine which categories and snippets are displayed.