Create read-only getters for the cancel operations

It's now possible to get a list of orders to cancel without actually canceling them.
Aggregate all orders into a single transaction

Rather than spamming tons of transactions for each market operation, combine them all into a single, massive transaction.
Bugfix
Return value of identified orders in order getters
Add assets freed by cancelations to balances

Before submitting new bids and asks, calculate how many shares will be freed by the cancelations and add those to the balances. This is necessary because we now cancel old orders and add new ones in the same transaction.
Add missing shebang to main.py
Bug fixes
Remove the stupid binaries; why are these in the repo?
Fix way too many bugs.
Fix even more bugs

Seriously, who wrote this? Have they ever heard of testing?
Re-enable btc38 feed

In theory it should work sometimes, right?... Then again, probably not.
merge nathan
merge fixes