Remove '/' from Service factor levels

Fixes bug where name of factor level is interpreted as part of file path.

Could be improved by generalizing to search and replace '/' with ''.
Changed name of function from doPlot to doPlotSVC
Set up named sections in script

Header, Setup, Script, and End
Format < 70 char per line
Save plots in list

Change function doPlotSVC and script_demo_script.R to save plots in list, as well as print.
Fix typo in header