0.1.0

• Refactor to use AST to check the environment (piping vs nonpiping) for verbs/functions instead of lambda functions

0.0.6

• Add context for X['a']
• Cleanup Symbolic namespace

0.0.4

• Bring context to functions

0.0.3

• Make verbs and funcs singledispatch functions.
• Change select to name for compile_proxy

0.0.2

• Rename single_dispatch to register_verb
• Add argument compile_attrs to register_verb
• Add allowed types for functions
• Separate operators.
• Allow changing piping sign

0.0.1

• First release