Spcm

**Full Changelog**: https://github.com/SpectrumInstrumentation/spcm/compare/v1.6.0...v1.6.1

Bug fixes:
* fixed a bug in the time stamp handling class
* fixed the example that uses time stamps

**Full Changelog**: https://github.com/SpectrumInstrumentation/spcm/compare/v1.5.2...v1.6.0

New Features:
* added Boxcar averaging example
* added Synchronous Digital IO handling and examples

Improvements:
* Check if the SCAPP option is available and improve the error message
* Improved handling of opening and closing cards without using a context manager

Bug fixes:
* Read back of input path register fixed

What's Changed
* Adding trg_timer method to DDSCommandQueue without unit conversion by spomjaksilp in https://github.com/SpectrumInstrumentation/spcm/pull/7
* Number of small bug fixes
* Added Gated and SpcmDeviceNotFound classes to the documentation
* Fixed unit conversion problems

New Contributors
* spomjaksilp made their first contribution in https://github.com/SpectrumInstrumentation/spcm/pull/7

**Full Changelog**: https://github.com/SpectrumInstrumentation/spcm/compare/v1.5.1...v1.5.2

**Full Changelog**: https://github.com/SpectrumInstrumentation/spcm/compare/v1.5.0...v1.5.1

Improvements:
- gated class iterator handling improved
- example gated recording
- FIFO multiple replay improved both example and class

What's Changed
* added a FIFO multi example
* added a gated triggering example
* fix for avail_modes by dhawals1939 in https://github.com/SpectrumInstrumentation/spcm/pull/6

New Contributors
* dhawals1939 made their first contribution in https://github.com/SpectrumInstrumentation/spcm/pull/6

**Full Changelog**: https://github.com/SpectrumInstrumentation/spcm/compare/v1.4.6...v1.5.0

**Full Changelog**: https://github.com/SpectrumInstrumentation/spcm/compare/v1.4.5...v1.4.6

Bug fix:
* Device identifier string not used correctly