Use cib to list and install bears

[underyx]

Inspired by the discussion at https://gitlab.com/coala/cib/issues/8

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[adtac]

@underyx you mean directly from the list of bears that we guess? But we need the metadata of each bear to know which languages it supports.

[jayvdb]

This is going to cause more problems than it solves.
Installation is hard. It is platform specific. It involves elevation of privilege.
IMO this is not a good idea.
(And the whole concept of cib installing bears is also a bit off, as 'success' is not success when they dependencies cant be installed, it has not attempted to cater for that in the design.)