WIP: Adding support for NextSeq

[johandahlberg]

I've started working on added NextSeq support as in #65, still needs test, qc criterias etc, but this is at least a start.

[codecov]

Codecov Report

Merging #69 into master will increase coverage by 1%.
The diff coverage is 100%.

@@         Coverage Diff          @@
##           master   #69   +/-   ##
====================================
+ Coverage      92%   92%   +1%     
====================================
  Files          19    19           
  Lines         701   726   +25     
====================================
+ Hits          638   662   +24     
- Misses         63    64    +1     

Impacted Files	Coverage Δ
checkQC/run_type_recognizer.py	93% <100%> (+1%)	⬆️
checkQC/config.py	90% <0%> (-1%)	⬇️
checkQC/exceptions.py	100% <0%> (ø)
checkQC/app.py	88% <0%> (+1%)	⬆️
checkQC/web_app.py	80% <0%> (+5%)	⬆️

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