Changed GUI, tools can act on mouse movement, more stuff

Changes to GUI
   Menu bar added - currently has file menu with no op new, load, and save buttons
   Toolbar changed - Buttons have icons, no op new, load, and save buttons added
   Status bar on the bottom, will eventually show tool status / other stuff
There's a bug where the 'new' button on the toolbar is selected/focused

Tools can act on mouse movement
   When creating components, you can drag the mouse to position the component
   When creating a wire, the wire follows the mouse

Changed the size of the grid from 16x16 to 20x20
Changed the look of components a little