Adapted PCA analysis scree plot to show all PCs
File reformat.

- tabs -> spaces
- Apply autoformat
[UAT-168] Show all component files

There was an bug with regexp so it took just files with number up 9 in name
Code improvements suggested during code review
UAT-168 Changed max number of components shown for PCA

The PCA analysis generate 3 types of results. Component-summary, scree-
plot, and gene-lists-per-component. The component-summary will show all
components, whereas the other two results are now capped according to
the new argument max.pcs.to.show, which is set to 10 by default.
Merge pull request #56 from thehyve/issues/UAT-168_PCA_show_all_PCs

Issues/uat 168 pca show all p cs