Allow Capitalized attribute names
Check that hash arg responds to #each_pair
Refactor: extract #check_arg
Refactor: extract #raise_not_a_hash_argument_error
Allow any (printable ascii) characters in attribute name
Allow a method to be defined
Modify general example (currently commented out)
Install pry
Invoke methods in the context of their object
Uncomment general example
Simplify Rakefile
Add version test
Add _all script (does _test, _lint, _build, _uninstall, _install)
Remove outdated comment
Refactor: extract method build_object
Refactor: rename variable o to object
Refactor: rename variable key to name
Refactor: extract method add_member
Refactor: extract method add_members
Refactor: replace multiline block with singleline block