Template: force encoding utf-8

File.read always returns US-ASCII; every read must force utf-8

Pass all  calls through utf-8 filter #230

@svevang - thought you would like to know.

lib/run_loop/template.rb

@@ -9,7 +9,7 @@ class UIAScriptTemplate < ERB
     # @!visibility private
     def initialize(template_root, template_relative_path)
       @template_root = template_root
-      @template = File.read(File.join(@template_root, template_relative_path))
+      @template = File.read(File.join(@template_root, template_relative_path)).force_encoding("utf-8")
       super(@template)
     end