Replaced imgages with Loki imagmes. (all 4 sized appropriately)

Modified text in index.php at line 110 "RaspAP" changed to "LokiAP"

Modified text in index.php at line 180 "RaspAP Wifi Portal" to "LokiAP Mixnet Portal"

Obtained master ulr and shortened with git.io

Modified Reame.md "$ wget -q https://git.io/voEUQ -O /tmp/raspap && bash /tmp/raspap" replacing git.io address with repo address
