Add missing test files to source dist manifest.

.travis.yml

@@ -6,6 +6,7 @@ install:
   - pip install coveralls
   - pip install -r requirements.txt
 script:
-  coverage run --source=bincopy setup.py test
+  - coverage run --source=bincopy setup.py test
+  - make test-sdist
 after_success:
   coveralls

MANIFEST.in

@@ -1,3 +1,3 @@
 include LICENSE
 include Makefile
-recursive-include tests *.py
+recursive-include tests *.py *.hex *.bin *.s19 *.txt *.hexdump *.i

Makefile

@@ -1,8 +1,19 @@
 test:
 	python2 setup.py test
 	python3 setup.py test
+	$(MAKE) test-sdist
 	codespell -d $$(git ls-files | grep -v "\.bin")
 
+test-sdist:
+	rm -rf dist
+	python setup.py sdist
+	cd dist && \
+	mkdir test && \
+	cd test && \
+	tar xf ../*.tar.gz && \
+	cd bincopy-* && \
+	python setup.py test
+
 release-to-pypi:
 	python setup.py sdist
 	python setup.py bdist_wheel --universal