improve user searching

* added search with wildcards
* added search by organization
Merge pull request #31 from engineyard/better-user-searching

improve user searching
Bump to 1.2.2
fix updating a user

* exclude self when checking user identities conflicts
Bump to 1.2.3
[mock] fix duplicate user identity issues

* updating the email to match an existing identity no-ops
Bump to 1.2.4
require_parameters requires non-blank values
[mock] #get_user id is required and an integer

* use SecureRandom#uuid
* formatting
Bump to 1.2.5
handle nil home directory error
collapse ~/.zendesk2 rescue logic
Bump to 1.2.6
model external id organization conflicts
user external_id uniqueness
cleanup spec data

* mock_uuid and mock_email helpers
Bump to 1.2.7
mock data id is always a string wip
mock data ids are consistently strings
fixes for realsies