mastercoin integration

Added mastercoin API
Added Follower for mastercoin
Support for mastercoin payments
Refactored out Asset and DB creation
Small fixes

removed some TODOs and fixed small things.
Added experimental exchange
Minor fixes - first run
fixes after first test
small fixes
Checking null results for local operations
minor changes
Removed unused funcionality

Removed some unused funcunality
Bug fixes in dividends
Fixed conversion from/to satoshis
Fixed many typos and protocol errors
removed cap. Will be handled in PaymentProcessor
conversion code

Added initial version of Lazooz conversion code...
Merge pull request #1 from amirza1/lazooz

Lazooz