Fix colors in Emacs light theme

Before, the only difference between the dark and light Emacs themes was the color for the default face, so the light theme looked very strange. This commit fixes the remaining faces for the light theme. My approach was to take the dark theme (which works well) and swap these pairs of colors:

<table>
<tr><td>base00</td><td>base07</td></tr>
<tr><td>base01</td><td>base06</td></tr>
<tr><td>base02</td><td>base05</td></tr>
<tr><td>base03</td><td>base04</td></tr>
</table>

The result is not perfect, but it's a significant improvement over the previous version.