Added a dict iteration example.  This fixes #64
Fixed do_filesizeformat to actually calculate correctly, fixes #59
Changed three major types to four major types  in nodes.py
Typo fix
Minor type: s/of/or/
Merge pull request #80 from joshmoore/master

Minor typo fix under docs/
Small typo fix to extension docs
Fixed a bug in the i18n extraction option handling and added a silent option.
Merge branch 'master' of github.com:mitsuhiko/jinja2
Support included blocks override
Add urlescape to default filters.
live up to @mitsuhiko's ridiculous expectations
Normalize to styleguide
Reworked implementation of the urlescape filter, made it Python3 compatible, documented it.
Renamed urlescape to urlencode
don't evaluate trans arguments twice.
fix previous commit, which was kinda nonfunctional
Fixed loop.last to not consume the entire iterator to determine if this is
the last iteration of the loop.
Merge pull request #92 from jasonkotenko/master

Fix loop.last memory issue
Added changelog entry for #92 and changed LoopContext.End to _last_iteration