use simplejson for Python 2.5

Author: soimort

.travis.yml

@@ -7,4 +7,6 @@ python:
   - "2.6"
   - "2.5"
   - "pypy"
+install:
+  - if [ "`python -c 'import sys; print(sys.version_info[0:2])'`" = "(2, 5)" ]; then pip install -r requirements.txt --use-mirrors; fi
 script: make test

requirements.txt

@@ -0,0 +1 @@
+simplejson

setup.py

@@ -5,7 +5,12 @@
 
 PROJ_METADATA = '%s.json' % PROJ_NAME
 
-import os, json, imp
+import os, imp
+try:
+    import json
+except ImportError:
+    import simplejson as json
+
 here = os.path.abspath(os.path.dirname(__file__))
 proj_info = json.loads(open(os.path.join(here, PROJ_METADATA)).read())
 README = open(os.path.join(here, 'README.rst')).read()