Package List As One Item Per Line & Order

I prefer lists to always be one item per line and in alphabetical order.

One item per-line makes merge conflicts less likely in the future.
Alphabetic ordering should mean any duplicate entries become obvious to
a human adding items.

Other orderings that future editors can easily spot and comply with are
fine and if there is a good reason to keep stuff bunched up (saving your
scroll wheel is not one) then that is fine too.  I just use this as a
"Do the following by default" guideline.

.appveyor.yml

@@ -27,9 +27,17 @@ install:
   - sh: echo ... for Linux
   - cmd: echo ... for Windows
   - sh: sudo apt-get update && sudo apt-get install
-        git cmake make xorg-dev g++ libcurl4-openssl-dev \
-        libavahi-compat-libdnssd-dev libssl-dev libx11-dev \
-        libqt4-dev qtbase5-dev
+        cmake
+        g++
+        git
+        libavahi-compat-libdnssd-dev
+        libcurl4-openssl-dev
+        libqt4-dev
+        libssl-dev
+        libx11-dev
+        make
+        qtbase5-dev
+        xorg-dev
 
 ##### Build Phase #####