add wifiqr.bash (& .gitignore) for creating QRs to join WiFis

bash/.gitignore

@@ -0,0 +1,2 @@
+# wifiqr.bash output
+*.png

bash/wifiqr.bash

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+# Arguments: SSID and WPA2 (3 untested) passphrase
+
+# Outputs QR code to terminal
+qrencode -t utf8 "WIFI:T:WPA;S:$1;P:$2;;"
+# Stores QR code as SSID.png, -s doubles pixel size from default 3
+qrencode -s 6 -o $1.png "WIFI:T:WPA;S:$1;P:$2;;"
+
+# Prints details
+echo "SSID: $1"
+echo "Passphrase: $2"
+echo "Stored as $1.png"