Renamed TSnippet class as TSnippetHelper and converted the class into a class helper for TDBSnippet: providing a kind of façade to TDBSnippet.
Redefined TSnippet as a simple alias to TDBSnippet. Added DB.USnippet to units that require it so that the class helper works.
Authored by: delphidabbler 2013-12-11
Parent: [r4224]
Child: [r4226]
