Fix python version to 2.7.6 for travis.ci

.travis.yml

@@ -1,17 +1,13 @@
 language: python
 python:
-  - "2.7"
+  - "2.7.6"
 
 before_install:
   - sudo apt-get install -q libatlas3gf-base libatlas-dev liblapack-dev gfortran
 
 install:
   - sudo apt-get update
-  - if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then
-      wget http://repo.continuum.io/miniconda/Miniconda-3.4.2-Linux-x86_64.sh -O miniconda.sh;
-    else
-      wget http://repo.continuum.io/miniconda/Miniconda3-3.4.2-Linux-x86_64.sh -O miniconda.sh;
-    fi
+  - wget http://repo.continuum.io/miniconda/Miniconda-3.4.2-Linux-x86_64.sh -O miniconda.sh;
   - bash miniconda.sh -b -p $HOME/miniconda
   - export PATH="$HOME/miniconda/bin:$PATH"
   - hash -r