add basic argv read

examples/hello.scri

@@ -0,0 +1 @@
+noop

scritcher/main.py

@@ -1,2 +1,11 @@
+import sys
+from pathlib import Path
+
 def main():
-    print('hello world')
+    try:
+        scri_path = Path(sys.argv[1]).resolve()
+    except IndexError:
+        print(f'usage: {sys.argv[0]} path/to/file.scri')
+        return
+    print('path', scri_path)
+    #run(scri_path)

setup.py

@@ -4,7 +4,9 @@ setup(
     name='scritcher',
     version='0.1',
     py_modules=['scritcher'],
-    install_requires=[],
+    install_requires=[
+        'Pillow==6.0.0',
+    ],
     entry_points='''
         [console_scripts]
         scritcher=scritcher:main