Remove --use-mirrors, try other ways to invoke manage.py, allow testing agains Python 3.2,3.3 & 3.4 to fail

.travis.yml

@@ -9,9 +9,9 @@ before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq python-dev gcc tesseract-ocr unpaper ghostscript libjpeg-dev libpng-dev poppler-utils
 install:
-  - "pip install -r requirements/testing.txt --use-mirrors"
+  - "pip install -r requirements/testing.txt"
 before_script:
-  - "manage.py initialsetup"
+  - "python manage.py initialsetup"
 script:
   - coverage run --source=document_indexing,documents,document_signatures,dynamic_search,lock_manager,folders,ocr,tags manage.py test document_indexing documents dynamic_search lock_manager document_signatures folders ocr tags
 after_success:
@@ -26,3 +26,10 @@ notifications:
     - roberto.rosario@mayan-edms.com
     on_success: never
     on_failure: always
+matrix:
+  allow_failures:
+    - python: 3.2
+    - python: 3.3
+    - python: 3.4
+
+