gmod_src: Added HTML:HTMLBack()

[garry]

[B]Revision 588[/B]
[INDENT]Added HTML:HTMLBack()
Added HTML:HTMLForward()[/INDENT][B]Changed Files:[/B]
[LIST]
[*]trunk/src_garrysmod/garrysmod/Objects/cl_lua_panel.cpp
[*]trunk/src_garrysmod/garrysmod/gmod_version.h
[*]trunk/src_garrysmod/vgui2/vgui_controls/HTML.cpp
[/LIST]
Committed By [B]Garry Newman[/B]