bump 0.1.0. Follow semver
Merge remote-tracking branch 'origin/master' into bump-0.1.0
update changelog
TocFilter: keep using the old punctuation stripping on 1.8.7

The UTF regexp doesn't seem to work correctly under 1.8.7 and causes
existing tests to fail. We don't really care about fixing this case
for 1.8.7 but we don't want the gem to be unusable, so we'll just
special case it for now.
Merge pull request #73 from jakedouglas/fix_ruby_1_8_anchors

TocFilter: keep using the old punctuation stripping on 1.8.7
Merge remote-tracking branch 'origin/master' into bump-0.1.0
note unicode only available for 1.9+
Merge pull request #68 from jch/bump-0.1.0

Bump version to 0.1.0. Follow semver.
Fix wrong class name at README.md

`HTMLInputFilter` is not exist.
Merge pull request #74 from tricknotes/fix-wrong-class-name

Fix wrong class name at README.md
In TableOfContentsFilter, generate a Table of Contents as a HTML unordered list of links to headers.

  * Add test cases for directly using HTML::Pipeline::TableOfContentsFilter
  * Add test cases for using HTML::Pipeline::TableOfContentsFilter within a HTML::Pipeline
  * Initialize result[:toc] to an empty string in TableOfContentsFilter#call
  * Initialize @toc to an empty string in TableOfContentsFilter#call
  * Set toc as an attr_reader on TableOfContentsFilter
  * Extract adding header anchor to TableOfContentsFilter#add_header_anchor
  * Define TableOfContentsFilter#append_toc for adding a toc item
  * Define TableOfContentsFilter#finalize_toc for wrapping toc items in a container
    * Markup from GitHub Styleguide Styling & CSS Navigation 8.3.1
  * Update TomDoc
  * Update README.md explaining generated Table of Contents
Keep TableOfContentsFilter interface consistent with other filters by removing attr_reader. Also, reduce complexity by removing private methods and keep changes within #call. Finally, implement #build_toc to wrap result[:toc] in an unordered list.
Remove #build_toc and move logic into #call, so all toc logic is within #call
Merge pull request #75 from simeonwillbanks/generated-table-of-contents

Generate Table of Contents
release 0.2.0
move activesupport as a development dependency
Merge pull request #79 from jch/activesupport-development-dependency

Move activesupport to a development dependency
bump 0.2.1