new lexer on the way
basic parser
remove unneeded BLOCK token
strip values and keys
Basic attempt
updated language docs with new language
add comment support
add support for empty dicts and lists
refactor tests
Merge branch 'jinja2' into ply

This configures a Jinja2 environment that is aware of the lazy
evaluation features of yay.
Remove dead code
Remove failing tests
Update version and CHANGES
Remove pyparsing
Remove yay.protectedstring
Sketch out some tests
failing test for list of dicts
support lists of dicts
parser supports lists of dicts
Some more nesting examples