Merge pull request #43 from harmjanwestra/master

- Fix handling of TriTyper data
Merge pull request #44 from harmjanwestra/master

Fix in NullPointerException in Graphics.java
Merge pull request #46 from harmjanwestra/master

Another PDF fix
This fixes some issues with the PCA optimum step and also removes PCAOptimumGeneticVectors.java (to increase maintainability)