Massively faster selectInput
Make tabsetPanel result visible

Without this, they don't show up in knitr documents
Always use Rscript from R_HOME
Separate option tags with newline
Update tests
Merge pull request #463 from jcheng5/bugfix/faster-select

Massively faster selectInput
Only show special "No UI defined" message for shinyAppDir
tweak an RStudio project option