Fix bug in `git-wc`.

This makes the log format use each commit instead of just the first one.
Combine 'th' scripts into one file.

This merges `th-clear`, `th-ls`, and `th-undo` into `th`. `th` accepts
an action argument for each one.
Add sudo checks to `sec-check`.

All relevant lines from '/etc/sudoers' are printed. 'NOPASSWD' lines are
printed separately.
Make sure /etc/sudoers is readable in `sec-check`.
Add root check to `sec-check`.

Some checks require root. This check is overridable by the '-f' flag.
Cleanup `sec-check` mount flag checks.

This structures the checks in a manner that is a bit more sane and that
is more correct (nodev in /dev wasn't right.)
Remove sec from `bu`.
Add root check to drive-dump.
Add `get-script-dependencies`.

This gets a list of potential dependencies for a script.
Add usage message to `git-remote-mod-url`.
Remove `th` scripts from makefile.
Add `todos`.

This finds 'TODO's and 'FIXME's.
Add `clean-text`.

This cleans up text by stripping leading a trailing whitespace and
squeezing repeated blank lines.
Update todo.
Add `todos` and `clean-text` to makefile.
Fix divide by zero error in `growth`.

The elapsed time was sometimes zero, so this adds one to the time.
Update TODO.
Update TODO.
Add `google-contacts-lookup`.
Make an 'ext' directory.

This directory contains external scripts (scripts I didn't make.)