Merge pull request #68 from edx/dependency-updates

Updated Multiple Dependencies

requirements/base.txt

-Django==1.7.1 						# BSD License
-Markdown==2.4.1 					# BSD
-django-model-utils==1.4.0 			# BSD
+Django==1.7.5 						# BSD License
+Markdown==2.6    					# BSD
+django-model-utils==2.2 			# BSD
 djangorestframework==2.4.4			# BSD
-ipython==2.1.0						# BSD
-django-rest-swagger==0.2.5  		# BSD
+ipython==2.4.1						# BSD
+django-rest-swagger==0.2.8  		# BSD
 djangorestframework-csv==1.3.3		# BSD
-django-countries==3.0.1             # MIT
+django-countries==3.2               # MIT
 -e git+https://github.com/edx/opaque-keys.git@d45d0bd8d64c69531be69178b9505b5d38806ce0#egg=opaque-keys