Cherry-pick tandibar/ui-select@c398bdcbfcf09a1f5294dd5fe464fef6316edbb5 : Allow tagging
Cherry-pick tandibar/ui-select@cebd6bbc68600fe521e78b41f0771b585336f453 : Added spec to test 'tagging'
Update dist after cherry-pick from @tandibar fork
Add tagging example
Add function in attributes for tagging management
Fix management of key input with tagging activated
Fix tests for tagging
Clean up code and add some comments for tagging