Add wait option to start and stop functions

[ildus]

No description provided.

[codecov-io]

Codecov Report

Merging #45 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   97.29%   97.31%   +0.01%     
==========================================
  Files          16       16              
  Lines        1370     1379       +9     
==========================================
+ Hits         1333     1342       +9     
  Misses         37       37

Impacted Files	Coverage Δ
testgres/node.py	97.56% <100%> (ø)	⬆️
tests/test_simple.py	99.77% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 34fdee2...2dc0659. Read the comment docs.

[funbringer]

Merged, thanks!