Lightweight Telemetry

[jaycedowell]

This PR adds a lightweight telemetry client to Bifrost to help provide insight into the users and usage of the Python portions of the library. This includes the ability to:

• track which Bifrost modules are imported,
• track which scripts in the tools directory are used,
• and record the average pipeline runtime.

All of this can be toggled on/off using either functions in the bifrost.telemetry module or with the bifrost_telemetry.py script in tools.

[codecov-commenter]

Codecov Report

Merging #152 (10c0c7e) into master (a531545) will decrease coverage by 0.18%. The diff coverage is 57.89%.

@@            Coverage Diff             @@
##           master     #152      +/-   ##
==========================================
- Coverage   61.51%   61.32%   -0.19%     
==========================================
  Files          64       65       +1     
  Lines        5264     5549     +285     
==========================================
+ Hits         3238     3403     +165     
- Misses       2026     2146     +120     

Impacted Files	Coverage Δ
python/bifrost/GPUArray.py	0.00% <0.00%> (ø)
python/bifrost/blocks/audio.py	11.53% <0.00%> (-0.97%)	:arrow_down:
python/bifrost/blocks/psrdada.py	4.34% <0.00%> (-0.10%)	:arrow_down:
python/bifrost/header_standard.py	0.00% <0.00%> (ø)
python/bifrost/psrdada.py	1.63% <0.00%> (-0.02%)	:arrow_down:
python/bifrost/udp_capture.py	0.00% <0.00%> (ø)
python/bifrost/udp_transmit.py	0.00% <0.00%> (ø)
python/bifrost/telemetry.py	34.96% <34.96%> (ø)
python/bifrost/DataType.py	65.67% <100.00%> (+0.52%)	:arrow_up:
python/bifrost/Space.py	65.00% <100.00%> (+3.88%)	:arrow_up:
... and 52 more

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[coveralls]

Coverage decreased (-0.2%) to 61.364% when pulling 10c0c7eac54487c5a0b62ff03697b7ef5d2e3b2a on telemetry into a53154552e2cf52ea8746f9c49f1f729973850bc on master.