Merge tag '0.1.0-beta.1' into develop

0.1.0-beta.1
Refactor filters and page requests types
Added filter tests
Update README.md
Add get account from an account ref
Merge branch 'develop' of github.com:jarias/stormpath-sdk-go into develop
Fix accountref get account
Fix readme
Delete .envrc and Godeps from vcs
Only one app is allow to be created
Bump version
Merge branch 'release/0.1.0-beta.2'