Release of tgui-2.0, marking the end of tgui-next transitional period

Next milestone in tgui-2.0 with addition of useBackend

Initial release of tgui-2.0, also known as tgui-next.

Initial release of tgui-1.0 by @neersighted.

Release v1.1.0

Merge pull request tgstation#2774 from Aranclanos/idedplsnerf

reduced a bit the damage from syndicate cards

Merge pull request tgstation#2672 from QualityVan/master

Secbot deconstruction + issue 2433