Update links at the bottom of readme

Author: retiutut

README.md

@@ -131,11 +131,9 @@ MIT
 
 ## Links
 
-[link_shop_wifi_shield]: https://shop.openbci.com/collections/frontpage/products/wifi-shield?variant=44534009550
-[link_shop_ganglion]: https://shop.openbci.com/collections/frontpage/products/pre-order-ganglion-board
-[link_shop_cyton]: https://shop.openbci.com/collections/frontpage/products/cyton-biosensing-board-8-channel
-[link_shop_cyton_daisy]: https://shop.openbci.com/collections/frontpage/products/cyton-daisy-biosensing-boards-16-channel
-[link_ptw]: https://www.pushtheworldllc.com
-[link_openbci]: http://www.openbci.com
-[link_gui_widget_tutorial]: https://docs.openbci.com/Software/OpenBCISoftware/GUIWidgets/#custom-widget
-[link_gui_run_from_processing]: https://docs.openbci.com/Software/OpenBCISoftware/GUIDocs/#running-the-openbci-gui-from-the-processing-ide
+[OpenBCI Main Site](http://www.openbci.com)
+[Ganglion Board](https://shop.openbci.com/collections/frontpage/products/pre-order-ganglion-board)
+[Cyton Board](https://shop.openbci.com/collections/frontpage/products/cyton-biosensing-board-8-channel)
+[Cyton+Daisy Boards](https://shop.openbci.com/collections/frontpage/products/cyton-daisy-biosensing-boards-16-channel)
+[GUI Widget Tutorial](https://docs.openbci.com/Software/OpenBCISoftware/GUIWidgets/#custom-widget)
+[Run GUI from Processing IDE](https://docs.openbci.com/Software/OpenBCISoftware/GUIDocs/#running-the-openbci-gui-from-the-processing-ide)