The log output at level 'INFO' was pretty cluttered. This cleans up the
log messages at the higher levels. In some cases, log message typos or
capitalizations were also fixed.
- Moved nijesdcore to cores/
- Moved udev, net, dtoverlay, uio to sys_utils/
- Made all imports non-relative (except in __init__.py files)
- Removed some unnecessary imports
- Reordered some imports for Python conventions
The clock_synchronizer, jesdcore, and dboard_clk_control objects don't
need to exist for the full lifetime of the Magnesium class. Having them
around complicates management of UIO file descriptors.
- re-wrote portions of the LMK driver for flexible rates and configuration
- tweaked TDC driver for compatibility and ease of debugging
- updated comments and log statements throughout for uniformity
