v0.0.7: Merge pull request #11 from TRON-US/escrow

1. add ledger.go for ledger common functions
2. update Makefile to build .go files

v0.0.6

• Add status server protos
• Wire prototool to chain up the whole steps.
• Set up yaml for gogo lint, fmt and complie
• Update makefile for gogo lint and build
• Organize package names and import
• Fixed time type for go-pg

v0.0.5

fix protoc relative path issue -- especially for proto depend import

ref issue

v0.0.4

Add proto files

v0.0.3

• Bandwidth limit should be float64

v0.0.2

• Separate node storage info from general node info

v0.0.1

• Add Node info struct from go-btfs-hub