#add New explicit constructors which append.
#add Move support for TSet::Append.
#add Move operators for TSetElement.
#change Some ranged-for loop changes.
#change Some existing code changed for testing (PluginManager, Subversion plugin).
#codereview robert.manuszewski,gareth.martin
[CL 2080362 by Steve Robb in Main branch]
This is to highlight that they will need to be upgraded before they can be used in the current version of the engine. Currently there is no upgrade step, but this will be implemented shortly. This addresses some of TTP #333190 (Project Browser: Improved workflow for opening projects from earlier versions of the editor)
Reviewed by Ben Marsh
[CL 2066916 by Andrew Rodham in Main branch]
- Added program-only plugin support and made UHT script plugin aware
- Added 3 generic script plugins with experimental Lua integration: ScriptGeneratorPlugin (UHT), ScriptPlugin (Engine), ScriptEditorPlugin (Editor-side)
- Lua integration is disabled by default
[CL 2058611 by Robert Manuszewski in Main branch]
