src: pass the v8::Context to CreateEnvironment
src: pass the v8::Context to CreateEnvironment

Pass in the v8::Context, instead of creating it
within CreateEnvironment.  This allows callers
to use a pre-existing context.

Signed-off-by: Fedor Indutny <e39d94bae70283f13d24c278e04952d6dad9384b@indutny.com>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node