Coerce only when necessary
Skip for coercables as well
core type coercion
Add exception handling and coerce_value tests
Updated tests because rbx TrueClass behavior is different than MRI
Remove built-in support for boolean, but all a proc
Add support for coercion to Complex and Rational
Error handling, test showing SystemStackError
core type coercion may be done!
A bit of cleanup
Add proc test for #coerce_value
doc updates
Merge pull request #200 from maxlinc/core_types

Improved coercion: primitives and error handling