You only need one '=' character to check if something is equal
Merge pull request #76 from nmeum/master

You only need one '=' character to check if something is equal. closes #75 and #76.
reflect aging formula changes in man page and README
More groff_man-ish coding style
Merge pull request #78 from ntsuji/groff_man

More groff_man-ish coding style
Add warning message if z.sh is executed instead of sourced.

Closes #74
Add Makefile for README
Use _Z_CMD in z -h
-c option restricts matches to subdirs of cwd.

Closes #83
Make -c without args work like regular z does
test directly, instead of testing exit variable
Allow options to be combined e.g -clt
update README to match man page
Remove extra . from man page.
Be explicit that -c matches should start with cwd, not just contain it.
chmod -x z.sh
Deal with spaces in $HOME
Merge pull request #86 from matthiasgoergens/master

Deal with spaces in $HOME when creating tempfile
Warn user if z's datafile path is a directory.

Cause this means z will fill up the directory with temp files, and not
work.
New option: -x

Removes the current directory from the data file.

Use case: sometimes `z tmp` lead me to `/tmp` whereas I was expecting to
be in `~/tmp`, with the new option I can do `z -x tmp`: it removes
`/tmp` from the data file and jumps to `~/tmp`.