Resolve "Migrate to state composites"

Closes #4 (closed)

added 4 commits

• 4e0d0537 - WIP work for composite
• 70a662f8 - Remove calibration things
• 5ad66bea - Add calib api, remove bugger get(), fix statePlusDelta()
• ef9a8285 - WIP fix gtests

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added 23 commits

• ef9a8285...33b26f32 - 21 commits from branch devel
• 674aeb01 - Merge remote-tracking branch 'origin/devel' into 4-migrate-to-state-composites
• ac0df9bc - Fix order of arguments

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added 4 commits

• ac0df9bc...6e7e33ce - 2 commits from branch devel
• 27779ab7 - Merge branch 'devel' into 4-migrate-to-state-composites
• 5beb1952 - Merge branch 'devel' into 4-migrate-to-state-composites

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added 9 commits

• 5beb1952...7022b8c8 - 6 commits from branch devel
• 2a20b41b - Fix some tests for composite priors
• d5019fab - Merge remote-tracking branch 'origin/devel' into 4-migrate-to-state-composites
• c444292a - Merge remote-tracking branch 'origin/devel' into 4-migrate-to-state-composites

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added 1 commit

• f5250cc2 - Fixed covariance calculation in gtest factor inertial kinematics

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unmarked as a Work In Progress

mentioned in commit fa89df8d

merged