fix CI on py2.6 and py3.2

Author: tomato42

.travis.yml

@@ -8,7 +8,7 @@ python:
   - "pypy"
   - "pypy3"
 install:
-  - pip install python-coveralls
+  - if [[ -e build-requirements-${TRAVIS_PYTHON_VERSION}.txt ]]; then travis_retry pip install -r build-requirements-${TRAVIS_PYTHON_VERSION}.txt; else travis_retry pip install -r build-requirements.txt; fi
 script:
   - coverage run setup.py test
   - python setup.py speed

build-requirements-2.6.txt

@@ -0,0 +1,3 @@
+tox
+coveralls<1.3.0
+idna<2.8

build-requirements-3.2.txt

@@ -0,0 +1,9 @@
+coveralls<1
+pylint<2.0
+coverage<4
+requests<2.11
+urllib3<1.11
+PyYAML<3.13
+tox<3.0
+wheel<0.30
+virtualenv==15.2.0

build-requirements-3.3.txt

@@ -0,0 +1,4 @@
+python-coveralls
+tox<3.0
+wheel<0.30
+virtualenv==15.2.0

build-requirements.txt

@@ -0,0 +1 @@
+python-coveralls