Add calamaresstyle script

HACKING.md

@@ -43,6 +43,10 @@ MyClass::myMethod( QStringList list, const QString& name )
 }
 ```
 
+You can use the `hacking/calamaresstyle` script to run
+[astyle](http://astyle.sf.net) on your code and have it formatted the right
+way.
+
 Naming
 ------
 * Use CamelCase for everything.

hacking/astylerc

@@ -0,0 +1,13 @@
+# Do not create a backup file
+suffix=none
+
+indent=spaces=4
+
+# Brackets
+style=break
+remove-brackets # Remove brackets on single-line `if` and `for` (requires astyle 2.04)
+
+# Spaces
+pad-paren-in
+pad-header
+align-pointer=type

hacking/calamaresstyle

@@ -0,0 +1,6 @@
+#!/bin/sh
+# Calls astyle with settings matching Calamares coding style
+# Requires astyle >= 2.04
+set -e
+
+astyle --options=$(dirname $0)/astylerc "$@"