Revert "removed xscreensaver startup from rc.lua"

This reverts commit 2ca4b8ffda1d0243d3058f265eae2ce8f51eb1ab.
Revert "removed hard home folder references"

This reverts commit 9990973de582d67ae3d78fc6390b9e5fe16a975f.
set wallpaper
added dropbox to awesome startup