0.9.3

• Fix #135: Add "last login" value to user endpoint
• Enh #47: Implementation of the "Invite new users" endpoint
• Enh #134: Implementation of the user account visibility property in the "Update an existing user" endpoint
• Enh #141: Tests for next version
• Fix #142: Fix visibility of the method Controller::getAccessRules()
• Fix #143: On user creation, status is always 1 even if set to another value