Issue 5 (#8)

* Fix #5 and add more tests

* Add MANIFEST.in file to include license and fonts, fix test dependency in setup.py

Author: vfdev-5

MANIFEST.in

@@ -0,0 +1,2 @@
+include LICENSE.md
+include image_dataset_viz/fonts/DejaVuSans.ttf

setup.py

@@ -31,6 +31,7 @@ def find_version(*file_paths):
     author_email="vfdev.5@gmail.com",
     url="https://github.com/vfdev-5/ImageDatasetViz",
     packages=find_packages(exclude=['tests', 'examples']),
+    include_package_data=True,
     install_requires=[
         'numpy',
         'Pillow',
@@ -39,10 +40,7 @@ def find_version(*file_paths):
     ],
     license='MIT',
     test_suite="tests",
-    extras_require={
-        'tests': [
-            'pytest',
-            'pytest-cov'
-        ]
-    }
+    tests_require=[
+        'backports.tempfile;python_version<"3"'
+    ]
 )