added new method 'get_user'
employee to user
revised get_users methods for story [#49575441]
updated gateway for story [#49575441]
updated gateway for story [#49575441]
updated gateway for story [#49575441]
updated gateway for story [#49575441]
updated gateway for story [#49575441]
added get_user test [#49575441]
added get_user test [#49575441]
added payroll/employee
added payroll/employee [#49575441]
added payroll employee test [#49575441]
Update gem spec

[Refs #4957544]
Merge pull request #4 from Thinkei/retrieve-employee-fields-4957544

Retrieve payroll employee fields