htmltools 0.3.5
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* `as.character` now returns a character vector with no other attributes.
  Previously it returned a character vector of class 'html'. (#31, #41)

* `htmlTemplate` now can use a string as a template instead of requiring a
  file. (#41, #43)

* HTML dependencies can now be added inline, instead of needing to use
  `attachDependencies()`. (#40, #42)

* `htmlDependency()` gained a new argument `all_files` to indicate whether all
  files under the src directory should be copied when rendering dependencies,
  or only those specified in the dependency objects. (#48)

* `copyDependencyToDir()` will always completely overwrite the target directory
  when copying HTML dependency files to make sure all dependency files are
  definitely updated in the target directory when the original dependency
  directory has been updated. In the past, the dependency files were not updated
  if they already existed. (#36)

* The version number in the directory name of an HTML dependency can be
  suppressed by setting options(htmltools.dir.version = FALSE) when the
  dependency is copied via `copyDependencyToDir()`. (#37)

* Performance improvement rendering tags, by switching from `readLines` to
  `readChar`.

htmltools 0.3
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* Add `css` function for conveniently forming CSS declaration strings.

* Add template support, with the `htmlTemplate()`, `renderDocument()`, and
  `suppressDependencies()` functions.


htmltools 0.2.9
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* Add check that `htmlDependency()` isn't called with an absolute path when a
  binary package is built. (#22)

* Allow HTML content to include UTF-8, Latin1, and system encoded content. All
  will be converted to UTF-8 using enc2utf8() at render time. (#21)

* Add `tagGetAttribute()` and `tagHasAttribute()` functions.


htmltools 0.2.7
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* Add "append" parameter to attachDependencies, to allow adding dependencies,
  instead of replacing them.


htmltools 0.2.6
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* Add "attachment" parameter to htmlDependency, which can be used to allow any
  file in the dependency directory to be available via URL at runtime.


htmltools 0.2.5
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* Explicit library(htmltools) is no longer required for tags to be rendered in
  knitr/rmarkdown documents.

* Added "viewer" parameter to html_print.


htmltools 0.2.4
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Initial release