flux-power-monitor v0.1

• Initial release to https://github.com/flux-framework/flux-power-monitor!
• Supports job-level power telemetry on diverse underlying architectures, including node-, CPU-, GPU- and memory-level power reporting.
• Utilizes Variorum for power data collection.
• Adds experimental GPU- and node-level power management algorithms in respective branches.
• Adds user-level documentation.