Add a Bash alias for "free"
Use "*" instead of "." for xterm's X resources

xterm doesn't like the lack of a wildcard for some reason.
dircolors: Replace the 256 color codes with normal color codes

This is needed to make the dircolors match true solarized dark colors.

When using the 256 color codes with a terminal that has altered base color
codes (e.g. via Xresources), the dircolors that actually get rendered are
slightly different from the true solarized colors (e.g. the green color
for executable files). The dircolors settings need to use the base color
codes for the true solarized colors because of the changes made in commit
a478bb8fa5d4aeb554d0040c6320477fa955a7b3.