augment var /*: T */ annotations w/ frzn weak locs
Adsafe.js: TCing most of quest

- Need to fihure out how to handle assignment to nodes
- And functions that expect some locations as frozen, but are thawed (e.g.
  error)
Adsafe.js: Started TCing adsafe in separate files

- H.o. function TCing is broken again.
- DJS lexer does not allow strings in dictionary type tags.
- There are points that slow down TCing noted in NOTES.txt
- Is there any change to get support for extern in scope other than toplevel?
Merged changes