bugfix and build objects from context (for hints)

[drtrigon]

First one was subtle with only rare issues. Second one allows to use e.g. time.time now or even time.time.__doc__ etc. only thing is it does not care for white-spaces in between, so time . time will trigger too - but I don't think this is severe.

I also tried parser and ast but both did not really help as far as I could see.

[honix]

Good work!