In travis and requirements.txt, add redis

.travis.yml

@@ -1,4 +1,5 @@
 language: python
+sudo: required
 python:
   - "2.6"
   - "2.7"
@@ -9,6 +10,15 @@ python:
   - "3.5-dev" # 3.5 development branch
   - "nightly" # currently points to 3.6-dev
 # command to install dependencies
+before_install:
+  - sudo apt-get install build-essential
+  - sudo apt-get install tcl8.5
+  - wget http://download.redis.io/releases/redis-2.8.3.tar.gz
+  - tar -xvzf redis-2.8.3.tar.gz
+  - cd redis-2.8.3
+  - make
+  - sudo make install
+  # - apt-get install redis-server
 install: 
   - "pip install -r requirements.txt"     
   - "pip install -e ."