Merge pull request #10 from imrahil/master

Exploded views
Cleaned up a junk directory.
New idler for Wally's bed.
Small edit on Wally's z pulley holder.
Typo in BOM
Merge pull request #11 from tommythorn/master

Typo in BOM
Lost of clean up but I did add an editable BOM for wally.  BOM WALLY.csv