Correct the desired width for Adium's tabs from double counting the icon and close button.
AdiumTabStyle: Scale the icon for the maximum width allowed.
-convertRectToScreen is not available on 10.6.
AdiumTabStyle: Enforce a width for the large image.

This keeps the text lined up and better centres the image.
AdiumTabStyle: Try to use the unofficial source list background colour for vertical tabs' background.
Merge pull request #33 from wixardy/master

Fix some issues with Adium's tabs
Update the build script.
AdiumTabStyle: adjust the icon in vertical tabs when the indicator is shown.
AdiumTabStyle: scale the large image to fit the forced width.
Also fix its vertical centring.
AdiumTabStyle: fix the title overlapping the icon.
Cleaned up -titleRectForBounds's variables that were used in both horizontal and vertical calculations.
Prevent creating invisible windows. If a single-tab window's tab is dragged onto itself, it'll disappear from view because the window it dragged from is hidden.
Clear highlighted cells when dragging starts.

When automaticallyAnimates is NO, a cell that was highlighted as the drag started did not get reset when the drag completed.