separate completion list and help into separate popups
first stab at shiny autocompletions
more work on shiny completions
completions for 'session'
finish up shiny completions
roll back context completion (intended fix did not work properly)
eliminate unused typedef
when checking comment behaviour, only get line up to cursor
be more careful when getting name of symbol
avoid infinite loop in 'getToken'
Merge pull request #201 from rstudio/feature/r-shiny-autocompletion

Autocompletion for server.R, ui.R with shiny documents
better completion popup key handling
limit number of evaluations when inferring completion type
Merge pull request #220 from rstudio/bugfix/completion-size-limitation

limit number of evaluations when inferring completion type
Merge pull request #219 from rstudio/bugfix/completion-popup-key-handling

better completion popup key handling
wire in completions for reference classes
don't preview keypress when not in R mode
wrap 'mget' in tryCatch to avoid promise evaluation errors
Merge pull request #222 from rstudio/feature/check-r-mode

don't let R completion manager preview keypress when not in R mode
Merge pull request #221 from rstudio/feature/completions-reference-classes

wire in completions for reference classes