[PATCH 1/2] add initial peak quality for output
[PATCH 2/2] iRT paper for Sara
[FIX] add Chauvenets criterion as a CLI flag

- possible to turn on/off the use of Chauvenets criterion
Added MRMRTNormalizer::rm_outliers_ransac
further changes
template for FeatureSetFinder tool
new data structures for spectrum spline interpolation
[FIX] removed redundant functions from AASequence interface
[FIX] factoring out AASequence parse function
amend
[FIX] removed redundant methods from AASequence interface
[fix] removed another function from AASequence
[FEATURE] SignalToNoiseEstimatorMedianRapid

- A SignalToNoise estimator based on median calculation but
  significantly faster than the SignalToNoiseEstimatorMedian
[TEST] add test for SignalToNoiseEstimatorMedianRapid
[FEATURE] PeakPickerMaxima

- maxima-searching PeakPicker based on PeakPickerHiRes
- this peak picker uses a cleaner interface and the new rapid signal to
  noise estimation
[FIX] performance improvement

- replace std::map with two doubles to keep track of current status of
  peak
[INTERNAL] move code to cpp file
[TEST] remove test to show numerically compatibility

- remove test to show numerically compatibility between the
  SignalToNoiseEstimatorMedian and rapid version
- the test took too long to execute, did not contribute significantly to
  unit testing
[FIX] switch to new Eigen spline

- use Eigen splines instead of gsl
[TEST] re-add old test files

- add new test files (after change by GSL removal)