[Truffle] Don't share profiles in FixnumToBignumNode.
[Truffle] Store context in FixnumOrBignumNode.
[Truffle] BigDecimal(double) and #toBigInteger need to be slow path.
[Truffle] Need to transfer because expensive construction of exceptions in Float#round.
[Truffle] Updated builder version, and don't build the -master variants.
[Truffle] Do build the master distros - remembered why I wanted them.
[Truffle] Update to Truffle 0.7-dev
[Truffle] Remove jruby-master so we copy over it, not into it.
Merge branch 'master' into truffle-head