make jinja2 ext
remove tests
remove mention of jinja tests
more work
continue working on this
Merge branch 'master' into jinja-ext

Conflicts:
	pipeline/jinja2/ext.py
	tests/tests/__init__.py
	tests/tests/test_jinja2.py
remove useless templates
improved tests
Merge branch 'master' into jinja-ext

Conflicts:
	pipeline/jinja2/ext.py
add jinja templates to Manifest
reuse code between jinja and django template tags
make actually work for real, and with python3 support
Merge pull request #181 from cyberdelia/jinja-ext

re-add proper Jinja2 support