Relax type check in SWIG_AsVal_int.

The array_member test-case revealed that integers
come in as `Numbers`.
Fix cleanup configuration for javascript test-suite.
Allow exceptions in generated example/test node extensions.
Use a diffent name for the V8_VERSION provided via command line.
Put the SWIG_V8_VERSION macro into "runtime" block.
Added missing template configuration files for nodejs based tests.
Merge pull request #17 from whoozle/devel

fixed v8-3.20+ compilation and deprecation warnings.