Merge pull request #44 from brad/travis

Travis configuration from brad

.travis.yml

@@ -0,0 +1,16 @@
+---
+
+language: python
+python:
+ - "2.6"
+ - "2.7"
+ - "3.2"
+ - "3.3"
+before_install:
+ - sudo add-apt-repository -y ppa:chrysn/openscad
+ - sudo apt-get update -qq
+install:
+ - sudo apt-get install -qq inkscape openscad
+script:
+  - python make_machine.py dibond
+  - python make_machine.py sturdy