change atoms to a uint16
print wallet weight
prepend all client inputs with signature
Merge pull request #160 from lukechampine/client

Client signatures
touchups to the client-cli code
get siblings in UploadFile
begin implementation of the client struct
Merge branch 'master' into upload
add Init() to client
add type Keypair to siacrypto
client reorganization
add RSEncode to quorum
address bugs/improvements from PR comments
Merge pull request #162 from DavidVorick/upload

Major Changes to Client