Corrected base.txt requirements

Updated the file to account for the fact that this is both a library and an application.

ECOM-3860

requirements/base.txt

-# Install the local package (and its requirements)
-.
+# NOTE (CCB): These requirements are duplicated from setup.py because
+# this package can serve as both a library and a standalone application.
+celery==3.1.18
+edx-rest-api-client==1.5.0

setup.py

@@ -6,7 +6,7 @@ with open('README.rst') as readme:
 
 setup(
     name='edx-ecommerce-worker',
-    version='0.3.2',
+    version='0.3.3',
     description='Celery tasks supporting the operations of edX\'s ecommerce service',
     long_description=long_description,
     classifiers=[