Updated .gitignore

Author: Jean-Philippe Fortin

.gitignore

@@ -5,4 +5,10 @@ Testing/FromJacob
 Python/neuroCombat/__pycache__
 R/neuroCombatData/inst/scripts/adni/
 R/neuroCombatData/inst/scripts/temp/
-R/neuroCombat/vignettes/neuroCombat.html
+R/neuroCombat/vignettes/neuroCombat.html
+papers/
+todo.txt
+plan.R
+dev/
+questions.txt
+simulations/