Code clean up. Adds the stackframe and makes only the body
        of the tables scrollable keeping the header visible.
        Shows the current function stack when paused or stepping.

        * Drosera/DebuggerApplication.m:
        (-[DebuggerApplication awakeFromNib]):
        (-[DebuggerApplication numberOfRowsInTableView:]):
        (-[DebuggerApplication tableView:objectValueForTableColumn:row:]):
        * Drosera/DebuggerDocument.h:
        * Drosera/DebuggerDocument.m:
        (-[DebuggerDocument dealloc]):
        (-[DebuggerDocument currentFrame]):
        (-[DebuggerDocument currentFrameFunctionName]):
        (-[DebuggerDocument currentFunctionStack]):
        (-[DebuggerDocument log:]):
        (-[DebuggerDocument windowWillClose:]):
        (-[DebuggerDocument webView:didEnterCallFrame:sourceId:line:forWebFrame:]):
        (-[DebuggerDocument webView:willLeaveCallFrame:sourceId:line:forWebFrame:]):
        * Drosera/Drosera.xcodeproj/project.pbxproj:
        * Drosera/debugger.css:
        * Drosera/debugger.html:
        * Drosera/debugger.js:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14972 268f45cc-cd09-0410-ab3c-d52691b4dbfc