Fixed basic_ugen optimizing
Improved supporting Demand

commit 496594efa54cad20cf12e0001390261a2899e837
Author: mohayonao <mohayonao@gmail.com>
Date:   Thu Nov 28 07:28:40 2013 +0900

    Added Demand/Dseq

commit b3bcaf28ea87ff77024c39a2fd0528b7553a748a
Author: mohayonao <mohayonao@gmail.com>
Date:   Thu Nov 28 07:28:24 2013 +0900

    Improved parsing JSON for Infinity

commit 640fee24c5d5d8d66a90020235f720c6d6afd4c5
Author: mohayonao <mohayonao@gmail.com>
Date:   Thu Nov 28 07:26:28 2013 +0900

    Improved basic op ugen for demand rate

commit 2ca48397a058322fac61f1704c3d562d9736fe87
Author: mohayonao <mohayonao@gmail.com>
Date:   Wed Nov 27 21:05:29 2013 +0900

    Added demand rate