Optimizes pieces of forwarding code.
dnu: lookupProperty:, forwardMessage:WithArguments: used

The semantics is cleaner.
Inline JS does only very specific tasks.
JSObjectProxy: removing old methods
asJavaScriptSelector commented, moved to Kernel-Objects
Merge pull request #449 from herby/optimized-forward

Optimizes pieces of forwarding code.
Merge branch 'master' into helios