Fix text coloring of queries in the buffer list.
This patch sets the status of query buffers based on whether or not the user is present, away, or gone.  The old code only set the color if the user was Gone, but this didn't even work because the regular color-picking code overrode the query-specific code.  Additionally, the old code would not have matched the selected theme, had it worked at all.
Merge pull request #125 from mamarley/querybuffertextcolorbugfix

Fix text coloring of queries in the buffer list.