Add logging to ALNS library

[N-Wouda]

Closes #66

[codecov]

Codecov Report

Merging #68 (f4b7848) into master (639a616) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #68   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines          367       383   +16     
=========================================
+ Hits           367       383   +16     

Impacted Files	Coverage Δ
alns/ALNS.py	100.00% <100.00%> (ø)
alns/accept/RecordToRecordTravel.py	100.00% <100.00%> (ø)
alns/accept/SimulatedAnnealing.py	100.00% <100.00%> (ø)
alns/stop/MaxIterations.py	100.00% <100.00%> (ø)
alns/stop/MaxRuntime.py	100.00% <100.00%> (ø)
alns/weights/SegmentedWeights.py	100.00% <100.00%> (ø)

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