Error(s) in re-building vignettes:
  ...
--- re-building ‘datatable-implementation.Rmd’ using rmarkdown
--- finished re-building ‘datatable-implementation.Rmd’

--- re-building ‘grattan.Rmd’ using rmarkdown
trying URL ‘https://hughparsonage.github.io/tax-drat/src/contrib/taxstats_0.1.0.1415.tar.gz’
Quitting from lines 81-83 (grattan.Rmd) 
Error: processing vignette 'grattan.Rmd' failed with diagnostics:
there is no package called 'taxstats'
--- failed re-building ‘grattan.Rmd’

--- re-building ‘model-income-tax.Rmd’ using rmarkdown
trying URL ‘https://hughparsonage.github.io/tax-drat/src/contrib/taxstats1516_1.0.0.tar.gz’
Content type 'application/gzip' length 7492439 bytes (7.1 MB)
==================================================
downloaded 7.1 MB

* installing *source* package ‘taxstats1516’ ...
** using staged installation
** R
** data
*** moving datasets to lazyload DB
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (taxstats1516)

The downloaded source packages are in
	'/tmp/RtmpoZkdZd/downloaded_packages'
--- finished re-building ‘model-income-tax.Rmd’

--- re-building ‘v201515-taxstats.Rmd’ using rmarkdown
trying URL ‘https://hughparsonage.github.io/tax-drat/src/contrib/taxstats_0.1.0.1415.tar.gz’
Content type 'application/gzip' length 60898251 bytes (58.1 MB)
==================================================
downloaded 58.1 MB

* installing *source* package ‘taxstats’ ...
** using staged installation
** R
** data
*** moving datasets to lazyload DB
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (taxstats)

The downloaded source packages are in
	'/tmp/Rtmp4iIRBK/downloaded_packages'
trying URL ‘https://hughparsonage.github.io/tax-drat/src/contrib/taxstats1516_1.0.0.tar.gz’
Content type 'application/gzip' length 7492439 bytes (7.1 MB)
==================================================
downloaded 7.1 MB

* installing *source* package ‘taxstats1516’ ...
** using staged installation
** R
** data
*** moving datasets to lazyload DB
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (taxstats1516)

The downloaded source packages are in
	'/tmp/Rtmp4iIRBK/downloaded_packages'
--- finished re-building ‘v201515-taxstats.Rmd’

SUMMARY: processing the following file failed:
  ‘grattan.Rmd’

Error: Vignette re-building failed.
Execution halted