update database version
progress toward implementing 3x collateral + interest bidding
partial fixes
Update wallet market functions to use transaction_builder

NEEDS TESTING
charging interest on cover ops
bump testnet
Adjust short APR to be absolute rather than a percentage
paying interest on covers
Merge branch 'short-interest' of github.com:BitShares/bitshares_toolkit into short-interest
Update cancel_market_orders to use transaction_builder
wallet_db::get_account_private_keys returns a map of keys and account
names
Add wallet::create_transaction_builder

Simple utility function to create and return a transaction_builder.
Important if external code ever wants to use one, since the builder
needs a pointer to the wallet_impl, which is not available to external
code.
Merge branch 'develop' into short-interest
Enforce APR limit
More progress on new transaction scanner and printer
Update fc submodule
Add a few logging statements to help analyze issue #833 where transactions are getting stuck in pending list.
Log the number of transactions being rebroadcast.
Fix pretty printer for short list
Attempt to fix short list from chain_database (WHY DOESN'T THIS WORK??)

For some reason `this` is trash when I call my->_short_db.last() and I
get back an invalid iterator...