Getting WiFi sorted on Raspberry Pi 2

Ran into a probelm with getting WiFi to connect on Raspberry Pi 2 using the Edimax EW-7811Un USB WiFi Adapter, and wanted to document the issue/solution!

Below are the links used to figure out the answer:
-http://superuser.com/questions/413818/ipv6-address-not-setting
-https://www.reddit.com/r/raspberry_pi/comments/3s11vd/help_needed_to_connect_raspberrypi_to_wifi_with_a/
-http://raspberrypi.stackexchange.com/questions/38424/wifi-not-working-on-raspbian-jessie
-https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=66656
-http://raspberrypihq.com/how-to-add-wifi-to-the-raspberry-pi/
-http://www.savagehomeautomation.com/projects/raspberry-pi-installing-the-edimax-ew-7811un-usb-wifi-adapte.html

Adding all these links in here; although the issue seems to have been fixed by a certain snippet of code in a config file, I do still wonder whether some of the tinkering with other parts of the code might have had some role in fixing this issue, or other issues that I unknowingly had which impacted this solution.

Will follow up with the solution (which seems to just be an) 'update' to the config shortly!