css tweaks from boston2008

here is some css we added to boston2008. the 2nd two are for the topics list page. the first for the comments.

.forum-comment .links {
line-height: 2.5em;
margin-right: 1em;
}

#forum TH {
border-bottom: 0px !important;
padding-left: 4px;
}

#forum td.posts, #forum td.topics { text-align: left !important }