forward declare JSRef constructor to make debug init from multiple files work
fix performMajorGC
weak refs and other fixes
remove rts_closures.js dependency
add missing hscore.js
add initial rts_js_p shim for linking when profiling enabled ( see also https://github.com/ghcjs/ghcjs/issues/175 )
add h$ prefix to names
WIP: cost-centre support
fix cc reference in ccs