Update 06. Using the Authorization Service.md

missing new before UnauthorizedException
Merge pull request #179 from Orkin/patch-1

Update 06. Using the Authorization Service.md
Add note about entity schema
String conversion should not be forced for rbac
hasAssertion accepts both types
Default identity does not implement IdentityInterface

Default AuthenticationService identity is not directly usable.
Merge pull request #184 from jmleroux/patch-1

Default identity does not implement IdentityInterface
Update 04. Guards.md

Document the empty roles for `RouteGuard` configuration
Add permission interface
Merge pull request #189 from jmleroux/patch-1

Update 04. Guards.md
Merge pull request #190 from ZF-Commons/permission-interface

Add permission interface
Merge pull request #183 from arekkas/patch-1

String conversion should not be forced for rbac
Add upgrade note
Merge pull request #191 from ZF-Commons/2.1

Prepare release for 2.1
Fixed documentation Error regarding `role_provider_manager`
Merge pull request #192 from ojhaujjwal/master

Fixed documentation Error regarding `role_provider_manager`
Hotfix for #194 using an array cache
Renamed hotCache to roleCache
Added test ObjectRepositoryRoleProviderTest:testRoleCacheOnConsecutiveCalls()
Fixed link to the cookbook