OOP - cleanup of new figure

cleaned up axis labels, scaling for oop-implicit care costs table
spouse claims - plotting utilization over time

added indicators for s having medicare 18m preceding R's death
created plots of mean, median utilization for S before and after R's death, by time window
oop - work on codebook

also minor comments updates in the code as I was working on codebook
spouse claims - mental health, any dx from IP claim variables added

In addition to variable for mental health as the admitting diagnosis, added
a new variable for mental health as any diagnosis from IP claims
Frequency of this is much higher when allow it to be in any diagnosis field
Carried throught to tables
Also added to KO's notes section so she has the variable names handy