Implement and map nqp::radix.
Uncomment more of NQPHLL.
Merge branch 'master' of https://github.com/MoarVM/MoarVM into zhuomingliang/patch-2
swtich radix op back to use int64 since int16 is NYI
Merge pull request #14 from zhuomingliang/patch-2

Implement nqp::radix.