Tolerance to bad casing; added 'Ra' as acceptable unit

run.rb

@@ -128,8 +128,9 @@ if @tunit.nil?
     puts "Error(#{errcount.to_s}): Temperature units not configured! Defaulting to Rankine. Continuing...\n\n"
     @tunit = 'R'
 else
-    case @tunit
-        when "C", "F", "K", "R"
+    case @tunit.upcase
+        when "C", "F", "K", "R", "RA"
+            @tunit = @tunit.capitalize
             print "OK\n".green.bold
         else
             errcount += 1
@@ -202,14 +203,14 @@ def process_tdata(host, simple=false)
         #if tdata.is_integer?
         if tdata.is_float?
             tdf = tdata.to_f
-            case @tunit
+            case @tunit.upcase
                 when "C"
                     #Do nothing; expected input is Celsius
                 when "F"
                     tdf = (tdf * 1.8) + 32
                 when "K"
                     tdf = tdf + 273.15
-                when "R"
+                when "R", "RA"
                     tdf = (tdf * 1.8) + 491.67
                 else
                     puts "#{@tunit} not valid temperature unit! Submitting unmodified output!"