add billing-detail interface#2

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pengyuwei wants to merge 12 commits intozyluo:masterfrom

pengyuwei:master

Commits on May 15, 2012

Fix dough api
Zhongyue Luo
committed

Commits on Jun 12, 2012

pyw's discovery
pengyuwei
committed

Commits on Jun 15, 2012

Commits on Jun 19, 2012

db.purchases.quantity type change from float to BigInteger
pengyuwei
committed

Commits on Jun 21, 2012

fix product.region.name none bug
pengyuwei
committed

Commits on Jun 27, 2012

fix subscribe failed bug
pengyuwei
committed

Commits on Jul 9, 2012

new_lb_protocol/add log
pengyuwei
committed

Commits on Jul 13, 2012

add log
pyw
committed

Commits on Jul 16, 2012

old version support
pyw
committed
add try for the farmer
pyw
committed

Commits on Jul 18, 2012

fix call load_balance bug:uuid/tenant_id;add log;
pyw
committed