added curly brackets to an if
more curly brackets and white space
add label argument to ggally_diagAxis
do not allow 'funny' names in the mapping
use column labels where applicable and store in pMat obj
stop checks for column labels
add parameter descriptions
document
better stop description
remove null arguments in aes
Merge branch 'dev' into splines

* dev:
  remove null arguments in aes
  better stop description
  document
  add parameter descriptions
  stop checks for column labels
  use column labels where applicable and store in pMat obj
  do not allow 'funny' names in the mapping
  add label argument to ggally_diagAxis
  more curly brackets and white space
  added curly brackets to an if