Updates templates to my current standard.

Updates these base templates to my current standard. This also moves import.R
and  preprocess.R into the file_templates folder which is really a better place
for them. I want the project template to be BASIC.
Initial Commit
Adds numerous new packages to the selection based on the following
URL: https://support.rstudio.com/hc/en-us/articles/201057987-Quick-list-of-useful-R-packages
Added the new versions of the old gregmisc stuff to the list. This
list should cover MOST people MOST of the time.
Small formatting change.