Analytics to BigQuery

[MrOrz]

Dependency: cofacts/rumors-db#62

This PR implements the following items recorded in the design doc:

• Loads rumors-db as submodules so that we can re-use Typwscripts type
• integrate BigQuery insert
• replace universal-analytics occurrences with own functions
  • inside these functions we still call ua() so that we send to both BQ and GA in the sake time to verify implementation

[coveralls]

Pull Request Test Coverage Report for Build 5017691545

• 15 of 19 (78.95%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.5%) to 91.078%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/lib/ga.ts	13	17	76.47%

Totals
Change from base Build 4874811899:	-0.5%
Covered Lines:	974
Relevant Lines:	1046

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💛 - Coveralls