revert to the old travis

can't get cython working...

.travis.yml

@@ -1,14 +1,5 @@
-matrix:
-  include:
-    - language: c
-      compiler: gcc
-      script: make
-
-    - language: c
-      compiler: clang
-      script: make
-
-    - language: python
-      python: "2.7"
-      before_install: sudo apt-get install cython
-      script: python setup.py build_ext
+language: c
+compiler:
+  - gcc
+  - clang
+script: make