1.  Added removeRange function
2.  Moved PROMPT_COMMAND into a function
3.  Added pyv function for editing python files
Added tests for removeRange
vimrc, added -ls, -grep, autochdir, tags=~/.sitetags
Minor tweaks to bashrc.  vimrc -grep now searches trunk_smads
Added vimrc tip, :mksession and vim -s
Added functions pgdropfunction, pgdroptable and diary functionality