Add STEM indicator
Add libraries for string manipulation, chaining
Fix variable labels
STEM plot changes
remove commented out mean table
Fix variable labels in scatterplot matrix
Clean up knitr chunk options
Clean up pca chunk labels
Remove "visual intelligence" regression
Move lit review summary to below end of document
Remove unnecessary lineup vs. other test plots, comments
Code to fix scatterplot matrix plot names
PCA explanatory text rearrange
Merge changes

Merge branch 'master' of github.com:srvanderplas/VisualAptitude

Conflicts:
	Paper/Draft1/TestingVisualAptitude.Rnw
Updated pdf