Bump version to 4.1.0 after release of 4.0.0

All further features will go to 4.1.*
bump micro version
fix token parsing and unparsing
adjust spec test to cover case of complex qualified username(hostname)
Merge pull request #16 from conjurinc/fix-role-from-username

Fix role from username
utility and helpers for DSL
added various convenience methods and a hack to make #permit idempotent
helpers for kind and mime_type
enable any object with #role or #resource to provide a role id or resource id
formatting
any new record which acts_as_user can provide an api logged-in as that user
modify version.rb