First attempt at HTML dependency management
Fix initial dependency handling, fix knit_print
Remove unused class
Use html_dependencies for showcase mode

For some reason, showcase mode was breaking sliders without this (e.g. 06_tabsets)
Use html_dependency for date inputs, datatables
Fix bootstrap themes
Add str.reactivevalues
Include html-preserving comments in knit_print
Fix argument name for S3 method
Add element argument to getRateCallback()
Bump version
Merge pull request #448 from trestletech/rate-element

Add element argument to getRateCallback()
fail when attempting to insert a shiny app into a cached chunk
Merge pull request #445 from wch/str

Add str.reactivevalues
Merge pull request #449 from rstudio/bugfix/knitr-cached-shiny

Fail when attempting to insert a Shiny app into a cached knitr chunk
Ensure dep.meta is an array
Merge branch 'html-deps'

Code reviewed by @jmcphers

Conflicts:
	DESCRIPTION
	R/bootstrap.R
	R/reactives.R
Bump version