Make linebreak normalization a bit more efficient.
Merge pull request #157 from cannona/patch-1

Make linebreak normalization a bit more efficient.
FIX: Performance black hole on sequential  characters
Merge pull request #158 from eviltrout/bracket_fix

FIX: Performance black hole on sequential  characters
FIX: Performance issue with escaped brackets `\]`
Expose `DialectHelpers` so people can include markdown-js and then add their own dialects.
Merge pull request #159 from eviltrout/escaped-bracket

FIX: Performance issue with escaped brackets `\]`
Merge pull request #160 from eviltrout/dialect_helpers

Expose `DialectHelpers` so people can include markdown-js and then add their own dialects
Update .gitignore.
Re-enable W053 after the relevant line.
It's "node.js".
README.md: switch to david-dm.org for the dependency badges.
Update dependencies.
Update .travis.yml.

Don't show tests as errored out when 0.11 fails. This should be removed when 0.11 or whatever version becomes stable.