title: CorePlot symbolsTouch prevents from dragging a plotSpace
body: <pre><code>-(void)scatterPlot:(CPTScatterPlot *)plot
           plotSymbolWasSelectedAtRecordIndex:(NSUInteger)idx
           withEvent:(UIEvent *)event{
  </code></pre>
  
  <p>I'm using this method to implement annotation creating on core plot. However it gets called right when a user touches the symbol. So that touch is being swallowed after that, and if the user wanted to scroll a plotspace and accidentally touch began on a symbol, the user wont be able to scroll, because the annotation would appear. 
  Is there a way to track if there was a complete touch on a symbol? Like a tap gesture?
  Thanks.</p>