Document character encoding behavior. Fix #41.
Add optional target argument to linkify.
Move Contributors to CONTRIBUTORS
WIP on delinkify, no meat yet.
More notes.
delinkify() works! Fixes #45.
Support whitelisting subdomains. Fix #47. Fix #48.
Update version and docs.
Add a nice, nasty security test.
Fixed tokeniser init signature to handle the new parser argument shipped in html5lib 0.95.
Version bump with fix.
Drop delinkify. Fixes #53.
Remove delinkify docs.
Enable Travis-CI.
Typoed.
Add tokenizer option to linkify().

Sometimes sanitization is not wanted when linkifying. This allows people
to pass HTMLTokenizer instead of HTMLSanitizer if they do not want
sanitization.
Remove unused imports.
Only use real/acceptable protocols.

Use HTMLSanitizer's whitelist of protocols to ensure we don't
generate <a> tags with hrefs the sanitizer will remove.
Changelists are good.
Fix a hang in the style attribute validation gauntlet

Turns out that the addition of a hyphen for vendor-prefixes causes a
long hang in the style validator. Not sure how long, but it seems to be
influenced by the length of the inline styles. This appears to fix it
and passes tests.