Add RunFileInScope API, catch script compilation errors from RunFile,…

… doc fix.

1.2: support instanceof for C++ embedded types and vu8::NoFactory.

More doc fix and improve.

Merge pull request #12 from lukemetz/master

Fix for gcc fpermissive error

Expose Context::RunFile via vu8.run() to run file with current context.

install fix, do not copy libv8 over itself

dist makefile target for building .tar.gz