- fix the broken pipe bug
- add some logging mechanism (/var/log/pacman.log)
- handle version comparators in makepkg dep resolution (eg, glibc>=2.2.5)
- have "group" designations
- record md5sums of all files in a package
- add a way to clean /var/cache/pacman/src
- duplicate dep checks occur with sync (one in sync, one in add)
- if a package is removed with --nodeps and re-installed, the requiredby
  fields of it's required packages are not updated
- add an option equivalent to 'pacman -Ql pkg | grep filename'
- add other options to config file: db location, overwrite behaviour, etc.
- use the COLUMNS env var for the progress bar
? use 'set -e' in makepkg?
x if a package fails, ask before aborting the full operation
  - can't -- further dependent packages may fail b/c of the first failure
? ask, then remove conflicting packages with --sync
? use a provides tag (instead of an OR operator in depends)
- add a 'cascade' option to --remove that will remove a package and
  all requiredby packages under it
- check $PACCONF env var
? use a 'trust pacman' config option for downgrading?
? build-time (source) dependencies in makepkg
? run ldd on every executable in a newly built package to find required so's
- add a --pretend option
- add a consistency/sanity check operation (md5 tracking for all files)
- add a --dbpath option
- use package caches more for performance
- clean up output a bit (message queue?)
- use a files.cache db for --owns and db_find_conflicts