add version to ocrd-tool.json (and setup.py)

qurator/dinglehopper/ocrd-tool.json

@@ -1,5 +1,6 @@
 {
   "git_url": "https://github.com/qurator-spk/dinglehopper",
+  "version": "0.0.1",
   "tools": {
     "ocrd-dinglehopper": {
       "executable": "ocrd-dinglehopper",

setup.py

@@ -7,8 +7,12 @@ with open("requirements.txt") as fp:
 with open('requirements-dev.txt') as fp:
     tests_require = fp.read()
 
+with open('ocrd-tool.json', 'r', encoding='utf-8') as f:
+    version = load(f)['version']
+
 setup(
     name="dinglehopper",
+    version=version,
     author="Mike Gerber, The QURATOR SPK Team",
     author_email="mike.gerber@sbb.spk-berlin.de, qurator@sbb.spk-berlin.de",
     description="The OCR evaluation tool",