added user agent
Merge pull request #53 from bsiddiqui/add-user-agent

added user agent
added missing state field to bank accounts docs
updated checks, jobs, and postcards to not use inline creation
removed addresses and verification example
Merge pull request #56 from bsiddiqui/update-example-scripts

Update example scripts
Merge pull request #57 from bsiddiqui/master

bumped gem version
updated installation instructions
updated link for api-key in usage section
updated download badge to show total downloads
moved creating a PDF under the supported image type section
changed section title to testing for testing section
updated order of API Reference to match lob.com