Revert "2.6 only"

This reverts commit 2a99621.

.travis.yml

@@ -3,6 +3,10 @@ env:
   - TEST_MODE=run_program
 python:
   - "2.6"
+  - "2.7"
+  - "3.2"
+  - "3.3"
+  - "3.4"
 install: .travis/install.sh
 script: .travis/test.sh
 after_success: .travis/finish.sh
@@ -12,3 +16,17 @@ notifications:
        - reprozip.gate@gmail.com
     on_success: change
     on_failure: always
+matrix:
+  include:
+    - python: "2.7"
+      env: TEST_MODE=check_style
+    - python: "2.7"
+      env: TEST_MODE=check_shared
+    - python: "2.7"
+      env: TEST_MODE=coverage_py
+    - python: "2.7"
+      env: TEST_MODE=coverage_c
+  exclude:
+    # This is already covered by coverage_py and coverage_c
+    - python: "2.7"
+      env: TEST_MODE=run_program