Fix packaging of spec files in python wheel

This commit ensures the "spec/*.yaml" files are copied to "src/pynwb/spec/*.yaml",
doing so allows the file to be packages into the distributed wheel.

{{ cookiecutter.namespace }}/.gitignore

@@ -4,6 +4,9 @@ docs/source/_format_auto_docs
 docs/source/_static
 !docs/source/_static/theme_overrides.css
 
+# copied spec files
+src/pynwb/spec/*.yaml
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

{{ cookiecutter.namespace }}/setup.py

@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 
+import os
+
 from setuptools import setup, find_packages
+from shutil import copy2
 
 setup_args = {
     'name': '{{ cookiecutter.namespace }}',
@@ -15,12 +18,27 @@
     ],
     'packages': find_packages('src'),
     'package_dir': {'': 'src'},
+    'package_data': {'': [
+        '{{ cookiecutter.namespace }}.namespace.yaml',
+        '{{ cookiecutter.namespace }}.extensions.yaml',
+    ]},
+    'include_package_data': True,
     'classifiers': [
         "Intended Audience :: Developers",
         "Intended Audience :: Science/Research",
     ],
     'zip_safe': False
 }
 
+
+def _copy_spec_files(project_dir):
+    ns_path = os.path.join(project_dir, 'spec', '{{ cookiecutter.namespace }}.namespace.yaml')
+    ext_path = os.path.join(project_dir, 'spec', '{{ cookiecutter.namespace }}.extensions.yaml')
+    dst_dir = os.path.join(project_dir, 'src', 'pynwb', 'spec')
+    copy2(ns_path, dst_dir)
+    copy2(ext_path, dst_dir)
+
+
 if __name__ == '__main__':
+    _copy_spec_files(os.path.dirname(__file__))
     setup(**setup_args)