Merge pull request #922 from edx/jarv/add-json-lint-to-travis

changing from ubuntu package to pip

.travis.yml

@@ -3,8 +3,9 @@ language: python
 python:
   - "2.7"
 install:
-  - "pip install --allow-all-external -r requirements.txt"
   - "sudo apt-get install -y npm python-demjson"
+  - "pip install --allow-all-external -r requirements.txt"
+  - "pip install --allow-all-external demjson"
   - "sudo npm install -g js-yaml"
 script:
   - |
@@ -17,7 +18,7 @@ script:
     done
   - |
     for json in $(find . -name "*.json"); do
-      jsonlint $json
+      jsonlint -v $json
       if [[ $? -ne 0 ]]; then
         echo "ERROR parsing $json"
         exit 1