make NewBalance take just 1 uint64
use loops in Makefile
remove MessageRouter interface
add BenchmarkMerkleCollapse
add more siaencoding tests
Separate wallet keys from sibling keys

Wallet keys are now completely independent from sibling keys during
bootstraping, something that enables the client to create a generic
wallet that doesn't expose the private key of the sibling. It's
important to keep them separate for anonymity reasons.

This commit is partially hacked together, and a restructuring of the
bootstrapping procedure is probably needed. Luckily, this should mostly
entail changing variable names and moving functions to different files,
with just a bit of code restructuring thrown in. Nothing as nasty as
we've done in the past.
homogenize errors in client-cli
Set and enforce naming conventions
provide cli support for joining - there are errors
finally remove global scriptEnv
pariticipants can now join, but when the third one joins they all kick eachother.
fixed snapshot failure issue
Merge pull request #194 from lukechampine/reorg

Remove global script execution environment
fix multi-join, debugging statments not removed
merge Luke's changes
add a minimal framework for creating wallets.
rename BootstrapWalletID to FountainWalletID
change PK and SK to PublicKey and SecretKey
untested infrastructure for requesting a wallet
restore functionality for requesting wallets from the fountain wallet.