update v8 to 3.25.30 (per in node.js v0.11.13)
add persistence wrapper for v8 handles
update tests for new v8
fix crash: pass correct objectWrapper
fix v8 exception rethrowing - save in persistent holder first
Merge pull request #35 from cpgf/feature/upgrade-supported-v8

update v8 to 3.25.30 (per in node.js v0.11.13)