get-lex: filtering and comments about filtering
remove unnecessary (fn [] and applying) that was done out of fear of realizing lazy sequences
formatting
README.md changes
learning markdown
formatting
add more 'getting started' content
cleanup
s/Verbcoach/Italianquiz/
Merge remote-tracking branch 'ekoontz/master'
merge with master
- (lightning-bolt) takes an additional optional argument ‘parent’ to filter possible grammar rules that can be a head child given that parent.

- more logging in (add-complement) to improve performance
add cache namespace for REPL debuggability
more add-complement logging