.travis.yml in pione-0.3.1 vs .travis.yml in pione-0.3.2

@@ -1,4 +1,7 @@
+before_script:
+  - sudo apt-get install bc # for processing Fib.pione
+
 language: ruby
 rvm:
 #  - "1.9.2" # PIONE doesn't support 1.9.2
   - "1.9.3"
 #  - "2.0.0" # pione doesn't work with 2.0