Add a quick icon for the toolbar (Just modified the executeCode.png file)
Extended the current execution options to include the ability to execute the code between two sections.
This is similar to the execute code block present in Matlab (such a great feature)
In the event that the cursor is not in a valid code section nothing will happen.
I have also added an icon to the menu bar in highlighting this new functionality.
It would be nice if the icon and the menu option were only present when and if the cursor is in a valid section block.