Generated grammar added to .gitignore
Added 'examples' package
Added cli module
Separated grammar and lexical exceptions
Added license to setup.py
Added ability to run yaql-cli right after setup
Merge pull request #5 from sergmelikyan/console-runner

Added ability to run yaql-cli right after setup
CLI will handle all runtime exceptions
Add 'in' operator to YAQL.
Merge.
Fix precedence for IN operator.
Merge pull request #6 from tsufiev/master

Add 'in' operator.
Context default data assignment now assigns $1 as well
Empty input is now properly handled in CLI
Merge branch 'master' of https://github.com/ativelkov/yaql