Don't strip whitespace in clean. Fix #88.
Docs typo.
Remove 'feed' from acceptable protocols.

Browsers handle the 'feed' URI scheme inconsistently and it can expose
dangerous behavior by nesting other schemes inside it.
Version bump v1.2.1 and changelog.
Pin html5lib==0.9.5 for now.

Addresses #94 but doesn't fix it. Will need to look into replacing
simpletree.

- Pin requirements file.
- Pin setup.py requirements.
- Add note to docs.
Non-critical typos.
Small doc fix: attrs is a dict of lists.
Update CHANGES and author_email.
Merge pull request #95 from rlr/doc-fix

Small doc fix: attrs is a dict of lists.
merge with bleach master and added test and bugfix