use sapply in complete.R
use sapply in corr.R
corr.R only read.csv once
simplify calls to *apply in corr.R and complete.R
simplify calls to *apply in corr.R and complete.R
Merge branch 'useApply' of https://github.com/ateucher/CompDataAnalysis into useApply

Conflicts:
	Assignment2/complete.R
tweak corr.R so returns numeric if no results
merge branch useApply