instanceof and typeof support
logical expressions
Merge pull request #12 from kumavis/master

Tests for literals and basic types
null and undefined literal test
support for primative types and sandboxing prototypes

closes #13
spelt primitive wrong - what a primate
extracted hoist to own package
readme note about primitive wrapping
0.7.0
early return on logic operators

fixes #15
use Object.prototype.hasOwnProperty

fixes #17
new expression

closes #16