Optional save of tsincr files

[mcgarth]

• make saving tsincr files (npy or tif) optional.
• controlled by new config parameter savetsincr
• default is on (savetsincr=1)
• saving of tscuml files is unaffected.

[codecov-commenter]

Codecov Report

Merging #276 into develop will increase coverage by 0.10%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #276      +/-   ##
===========================================
+ Coverage    93.17%   93.27%   +0.10%     
===========================================
  Files           26       26              
  Lines         3207     3198       -9     
  Branches       495      492       -3     
===========================================
- Hits          2988     2983       -5     
+ Misses         137      133       -4     
  Partials        82       82              

Impacted Files	Coverage Δ
pyrate/default_parameters.py	100.00% <ø> (ø)
pyrate/core/timeseries.py	90.51% <100.00%> (ø)
pyrate/merge.py	95.20% <100.00%> (+2.34%)	:arrow_up:
pyrate/process.py	91.74% <100.00%> (-0.04%)	:arrow_down:

---

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 d0c8bdb...0038f89. Read the comment docs.

[tfuhrmann]

I've run two PyRate runs using "savetsincr: 0" and "savetsincr: 1" on a test data set and can confirm that the results of both runs finished without errors and generated the results as expected.