Add :link_attributes option to the HTML renderer

Add a new HTML renderer option, :link_attributes, which takes a hash
of extra attributes to be added to all links.
Fix typo
Hey I'm @vmg
Update homepage on the Gemspec
Update .gitmodules

tanoku → vmg
Merge pull request #150 from bquorning/patch-1

Update .gitmodules
ignore generated lib/redcarpet.bundle
normalize setup and tell people that tests are faster without bundle exec
Merge pull request #157 from grosser/gemfile

Gemfile
Merge pull request #155 from grosser/ignore

ignore generated lib/redcarpet.bundle
fenced code blocks do not work without space
Update sundown to most recent commit
Symlink sundown sources instead of copying them
MKDEXT_LAX_HTML_BLOCKS has been renamed to MKDEXT_LAX_SPACING
Update URL of submodule
Merge remote-tracking branch 'x3ro/update-sundown'
Drop the Sundown module
Re-add the Sundown submodule with proper paths
Bump Sundown to master
Merge remote-tracking branch 'grosser/fence_without_space'