Tweak a bit the Makefile

Change-Id: I42a03da088d776cfad0bedd887fbd3cb4d75a997

Makefile

@@ -4,11 +4,17 @@ COVERAGE = $(ROOT)/build/coverage
 PACKAGES = analyticsdata
 DATABASES = default analytics
 
-validate: test.requirements test quality
+.PHONY: requirements develop clean diff.report view.diff.report quality syncdb
+
+requirements:
+	pip install -q -r requirements/base.txt
 
-test.requirements:
+test.requirements: requirements
 	pip install -q -r requirements/test.txt
 
+develop:
+	pip install -q -r requirements/local.txt
+
 clean:
 	find . -name '*.pyc' -delete
 	coverage erase
@@ -38,5 +44,7 @@ quality:
 	# Ignore module level docstrings and all test files
 	pep257 --ignore=D100,D203 --match='(?!test).*py' $(PACKAGES)
 
+validate: test.requirements test quality
+
 syncdb:
 	$(foreach db_name,$(DATABASES),./manage.py syncdb --migrate --database=$(db_name);)