cleaning: return keys as buffers; rename `cb` to `next` in waterfalls
reset account WIP
Merge pull request #52 from mozilla/reset_srp

Reset account [wip]
hex all the strings. closes #51
Merge pull request #53 from dannycoates/hex

hex all the strings
include salt in encrypted bundle from client on reset
use a single resetToken field instead of multiple
delete tokenId/hawk documents associated with signToken/resetTokens
Merge pull request #58 from mozilla/fix_reset_srp

Fix reset srp
add payload verification for fields expected to be hex strings
Merge pull request #57 from dannycoates/verihex

add payload verification for fields expected to be hex strings
Began api.md documentation

Also changed the responses for /create and /entropy
so that all responses are JSON
began implementing reference client
Merge pull request #60 from dannycoates/docs

API docs and reference client
use old kA on account reset - fixes #59
Merge pull request #61 from zaach/reuse_kA

use old kA on account reset - fixes #59
linked API doc and reference client from readme
Merge pull request #63 from dannycoates/master

Link API docs in the readme
updated api.md
seasoned api.md