byte-compile warnings

[diamond-lizard]

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When I byte-compile origami, I get these warnings:

In toplevel form:
origami.el:38:1:Warning: Package cl is deprecated
origami.el:98:1:Warning: Unused lexical argument ‘l’
origami.el:98:1:Warning: Unused lexical argument ‘e’
origami.el:98:1:Warning: Unused lexical argument ‘b’
origami.el:160:1:Warning: Unused lexical argument ‘ov’

In origami-setup-local-vars:
origami.el:438:26:Warning: assignment to free variable ‘origami-history’
origami.el:439:32:Warning: assignment to free variable ‘origami-tree-tick’

In origami-store-cached-tree:
origami.el:451:30:Warning: assignment to free variable ‘origami-tree-tick’
origami.el:452:43:Warning: reference to free variable ‘origami-history’
origami.el:452:59:Warning: assignment to free variable ‘origami-history’

In origami-update-history:
origami.el:459:38:Warning: reference to free variable ‘origami-history’
origami.el:459:38:Warning: assignment to free variable ‘origami-history’

In origami-get-fold-tree:
origami.el:497:9:Warning: reference to free variable ‘origami-mode’
origami.el:502:1:Warning: Unused lexical argument ‘buffer’

[rromoli]

I get the same error...indeed I'm not able to use it or have it to be installed...very annoing