Update getclean.md

Added link to website explaining OLAP operations in R very well.
fixed conflicts from olap
Merge branch 'pprevos-master'
R Programming Site
Update getclean.md
Merge pull request #18 from lopezrj/master

R Programming Site
Merge pull request #19 from thoughtfulbloke/master

Update getclean.md
Kite Graph

Add kite graph as example of working through new kind of graph
Merge pull request #21 from thoughtfulbloke/master

Kite Graph