Add Gravatar tutorial
Merge branch 'master' into gravatars

Conflicts:
	tutorials/index.rst
Added gravatars

- Filled out the gravatars tutorial
- Added the model method and tests to myblog/
Clarify Meta inner class
Do not show class when defining new methods
Template path fix
Add note about calculating MD5 hash
Change grammar
Add note about importing hashlib library
Fix MD5 capitalization and "128-bit"
Merge pull request #88 from pythonsd/meta-explanation

Clarify Meta inner class
Merge pull request #90 from pythonsd/forms-template-path-fix

Template path fix
Merge pull request #75 from pythonsd/gravatars

Add Gravatar tutorial
Fix typo (test.py -> tests.py)

Fixes gh-92.  Thanks @chrishiestand.
Merge pull request #95 from pythonsd/fix-test.py-typo

Fix typo (test.py -> tests.py)
Merge branch 'master' into readable-urls

Conflicts:
	myblog/blog/models.py
	tutorials/index.rst