[travis] Fixing import error in travis

in python2, encoding is not taken as an argument to open()

Author: tasdikrahman

.travis.yml

@@ -4,8 +4,8 @@ python:
   - "3.4"
 
 install:
-  - "pip install ."
   - "pip install -r requirements.txt"
+  - "pip install ."
 
 notifications:
   webhooks:

setup.py

@@ -15,8 +15,12 @@
 here = path.abspath(path.dirname(__file__))
 
 # get the dependencies and installs
-with open(path.join(here, 'requirements.txt'), encoding='utf-8') as f:
-    all_reqs = f.read().split('\n')
+if sys.version_info[:2] <= (2, 7):
+    with open(path.join(here, 'requirements.txt')) as f:
+        all_reqs = f.read().split('\n')
+else:
+    with open(path.join(here, 'requirements.txt'), encoding='utf-8') as f:
+        all_reqs = f.read().split('\n')
 
 install_requires = [x.strip() for x in all_reqs if 'git+' not in x]
 dependency_links = [x.strip().replace('git+', '') for x in all_reqs if 'git+' not in x]