updated/fixed command messages
implement permission check on myself; switch privilege and role arguments to make role optional
bump version to 2.5.0; incompatible with 2.4 due to resource:check argument swap
use option [:r,:role] to check permission on a specific resource
Merge branch 'check-my-permission' of github.com:inscitiv/cli-ruby into check-my-permission

Conflicts:
	lib/conjur/command/resources.rb
	spec/command/resources_spec.rb