Rebase remove old illixr metrics (#26)

* Removed unused old ILLIXR metrics code

Removed the conditional include of the older cpu_timer.hpp. Removed the
commented out timer macro.

* Removed old ILLIXR metrics code and updated thread constructor calls

Removed the old cpu_timer.hpp conditional includes. Changed the
timed_thread() calls to std::thread() constructor calls.

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Co-authored-by: Mark Van Moer <mvanmoer@illinois.edu>

Add assertion headers to prevent use of undeclared identifier assert …

…error messages

correct imu_integrator_input time to be the camera time (#19)

Issue 58 standardize clock (#14)

* Move cvtfmt into open_vins

* MTP fix is done?

* Add back prints

* Gate prints

* New Switchboard API (mem leak)

* New allocate

* Replaying merge with master

Co-authored by Sam Grayson <sam@samgrayson.me>

* Use time_point

* Fix broken merge

* Fix broken merge

* wip

* wip

* use relative clock

* remove first dummy pose

* should not use _m_rtc->now() before it started

* clean up

* no dummy first pose and relative clock needed

* Only print average time in dbg build

Co-authored-by: Samuel Grayson <sam@samgrayson.me>
Co-authored-by: Jeffrey Zhang <jeffrey.zh4ng@gmail.com>
Co-authored-by: Giordano Salvador <73959795+e3m3@users.noreply.github.com>
Co-authored-by: Muhammad Huzaifa <huzaifa2@illinois.edu>

Sync'd to ILLIXR/ILLIXR new Switchboard API

Merge pull request rpng#186 from rpng/develop_v2.4

Development v2.4 - Camera classes, Masks, Formatting and Smaller Fixes

SOSP checkpoint

Sync'd to ILLIXR/ILLIXR new Switchboard API

Sync'd to ILLIXR/ILLIXR development head

Sync'd to ILLIXR/ILLIXR v2.1.9