Add dual shared and static cmake targets and enable cpack package generation

[masariello]

No description provided.

[edenhill]

@raulbocanegra @Oxymoron79 @benesch
Can you please review these CMake changes?

[masariello]

@edenhill @raulbocanegra @Oxymoron79 @benesch
I think I covered all the corners about a month ago.
Can this be merged now?
Thanks

[edenhill]

There's similar work being done in #3130, would be good if these two efforts could be combined.

[edenhill]

Please resolve the conflicts

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