Removed 1/2 linewidth hack, it is a bad idea for the outline, fixes issue 8

git-svn-id: https://flot.googlecode.com/svn/trunk@27 1e0a6537-2640-0410-bfb7-f154510ff394

TODO

@@ -9,7 +9,6 @@ handling time data
 
 grid configuration
   - how ticks look like
-  - (handling of 1/2 linewidth hack in grid?)
 
 selection
   - user should be able to cancel selection with escape

jquery.flot.js

@@ -434,7 +434,7 @@
             ctx.lineWidth = 2;
             ctx.strokeStyle = options.grid.color;
             ctx.lineJoin = "round";
-            ctx.strokeRect(ctx.lineWidth/2, ctx.lineWidth/2, plotWidth, plotHeight);
+            ctx.strokeRect(0, 0, plotWidth, plotHeight);
             ctx.restore();
         }