fix gc marking for our atoms which don't have gc pages associated with them.  also add some ifdefed out code to preallocate a number of pages for the heap, although this appears to *really* hurt performance in the alloc1 test.
fix gc marking for our atoms which don't have gc pages associated with them.  also add some ifdefed out code to preallocate a number of pages for the heap, although this appears to *really* hurt performance in the alloc1 test.

toshok/echojs,toshok/echojs,carlosalberto/echo-js,toshok/echojs,toshok/echojs,carlosalberto/echo-js,carlosalberto/echo-js,toshok/echojs,toshok/echojs,carlosalberto/echo-js,toshok/echojs,carlosalberto/echo-js,toshok/echojs,carlosalberto/echo-js