Add Bullet configuration option to monitor contacts

[coveralls]

Pull Request Test Coverage Report for Build 8910277918

Details

• 61 of 78 (78.21%) changed or added relevant lines in 9 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.5%) to 89.003%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
vulp/actuation/tests/InterfaceTest.cpp	0	1	0.0%
vulp/actuation/BulletInterface.h	2	8	25.0%
vulp/actuation/BulletInterface.cpp	25	35	71.43%
<!--	Total:	61	78	78.21%	-->

Totals
Change from base Build 8523872317:	-0.5%
Covered Lines:	1813
Relevant Lines:	2037

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💛 - Coveralls