Updated task management to better match Gevent pool interface

[jtc42]

No description provided.

[codecov]

Codecov Report

Merging #55 into master will decrease coverage by 0.43%.
The diff coverage is 84.78%.

@@            Coverage Diff             @@
##           master      #55      +/-   ##
==========================================
- Coverage   98.82%   98.38%   -0.44%     
==========================================
  Files          39       39              
  Lines        1612     1613       +1     
  Branches      247      247              
==========================================
- Hits         1593     1587       -6     
- Misses          6       11       +5     
- Partials       13       15       +2     

Flag	Coverage Δ
#unittests	98.38% <84.78%> (-0.44%)	⬇️

Impacted Files	Coverage Δ
labthings/core/tasks/__init__.py	100.00% <ø> (ø)
labthings/core/tasks/thread.py	97.67% <66.66%> (-2.33%)	⬇️
labthings/core/tasks/pool.py	90.16% <86.11%> (-8.17%)	⬇️
labthings/server/default_views/tasks.py	100.00% <100.00%> (ø)

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[jtc42]

@rwb27 Something to be aware of when this gets merged into master. This changes the task and task pool interface to better match Gevent. The taskify function doesn't change at all though, so things like the OFM should be fully compatible.