Add version badge
Locked sanitize @ 2.0.3 to avoid conflict with nokogiri 1.5.x
Merge pull request #25 from amiuhle/sanitize-2.0.3

Locked sanitize @ 2.0.3 to avoid conflict with nokogiri 1.5.x
Add explicit version constraints to sanitize and nokogiri dependencies. Closes #26
Release 1.0.2
Add support for on-disk file references.
Add symlink support to on_disk files.
Fix realpath() on Ruby 1.8.
Merge pull request #27 from cpence/master

Add support for references to files on disk
Release 1.0.3
Require pathname when needed, should fix gollum/gollum#728.
Drop 1.8.7 support on Travis (It's broken)
Drop 1.8 support
Merge pull request #29 from cpence/master

Require pathname when needed, should fix gollum/gollum#728.
Merge upstream changes