fix for ecma3/String/e15_5_3_1_3.abc
fix typeof for new'd primitives
avoid TypeError caused by applying getPrototypeOf to a primitive value (fixes tamarin string test); avoid false positive on assert with '' condition
tighten avm2 test harness; update pass list
Merge pull request #89 from artcompiler/master

Various string fixes and updates to numbers.js and test pass list