Fix for https://github.com/preillyme/v8js/issues/6. This is probably a horrible hack but it works for now until we have a better solution.
Always increase the zval reference count before storing it in a V8 internal field.
First working version of CommonJS modules.
Use the Z_ADDREF_P macro to increasing the refcount of PHP values assigned to V8.
Use the Z_ADDREF_P macro to increasing the refcount of PHP values assigned to V8.
Check for module cyclic dependencies. Throw proper V8 exceptions when the require method is not successful.
Removed spurious line.
Normalisation of module identifier.
Handle exceptions throw from module loader callback.
Removed spurious number from exception message.
Support for relative and absolute module identifiers.
Improve compatibility with NodeJS-style module.exports and exports. This allows arbitrary types to be exported, not just properties of the exports object.
Script timeout thread to forcefully terminate the current thread of V8 execution in the corresponding isolate.

Note that threads are implemented using std::thread which is only available in C++0x. The relevant compile flags have been added but compiler support has not been tested and is therefore not guaranteed.
Added my name to the credits :-)
Implemented memory limit checking. Increased stability for V8 execution isolates.
Renamed V8JsException to V8JsScriptException and added V8JsTimeLimitException and V8JsMemoryLimitException classes.
Merged CommonJS modules functionality.
Removed v8::V8::Dispose call because it was causing SIGTRAPs in some exit scenarios. This is probably due to using the debug version of V8, but the documentation states that it's not necessary to call this anyway.
Use the PHP memory management functions emalloc and efree.
Refactor CommonJS modules functionality to store state in the extension globals and context as appropriate.