gitignore: _vim/.netrwhist
procmail: filter junk, support for vacation mails
several vim improvements

* force dark background
* Q repeats last macro
* <C-h> (j,k,l) to navigate splits
* :w!! save as root
* ctrl-l clears search highlighting
* F6: gundo
* F7: tagbar
* F8: syntastic
* F9: save & make
* <C-g><C-t> inserts current time
bash prompt for hg: bugfix

hg summary outputs hash and tags for "^parent:", script must extract
just the hash (and filter any tag)
bashrc: search whole $PATH for virtualenv
backup: configuration for pogo
vim/pathogen: also add help files