Fix build for TTS

README updates

Handle execution in unknown scripts (probably in a bad state)

Added debugger support for closure vars, globals and REPL at various …

…stack frames

TTS specific README

Debugger stop reasons (breakpoint vs. stepping etc.)

Updated TTS hacks - support mod reloading on existing debug sessions

Simultaneous VSCode script debugging

A README

RC for 2.0.0.0