remove party dependency
Merge branch 'master' of https://github.com/zmjones/datamining
tikz dag

removed exogenous variable
made pretty with tikz!
fixed missing dependency
removes dag txt
moves table to appendix
separates sections in appendix
adds new simulation

 - modified simulation somewhat
 - binary_cat_int might need work
 - new plots
 - new discussion
 - needs reference in text