Add controller example
Add logger example with validation
Disable debug
Add controller example

Conflicts:
	spec/examples/controller_spec.rb
Add logger example with validation
Make and_then an alias of map
Make or_else an alias of map_err
Experimental
Experimental enum
Remove repeating include Deterministic in specs
Add controller example
Disable debug
Add enum
Refactor exec context
Refactor
Implement List
Implement Option as AGT
Merge branch 'pz_enum' of github.com:pzol/deterministic into pz_enum