Merge pull request #4 from stevenzeiler/master

Configure database using POSTGRES_URL environment variable.
[CHORE] Changed db config to work with heroku
[CHORE] Refactoring
[FIX] Fixed parameter bug
[FIX] Fixed parameter bug
[CHORE] Logging errors
[FIX] Fixed parameter bug
[FIX] Fixed parameter bug
[FIX] Fixed parameter bug
[FIX] Fixed parameter bug
[FIX] Fixed XRP amount handling
[FIX] Fixed XRP amount handling
[CHORE] Adding test script
[FIX] Fixed amount verificaiton bug
[FEATURE] Starting to add additional information to error message
[FIX] Fixed db connection issue
[DOC] Added API documentation
[DOC] Added API documentation
[DOC] Added API documentation
[DOC] Added API documentation