Add prompts for most variables (#319)

cookiecutter.json

@@ -21,5 +21,15 @@
         "docs/_templates/autosummary/**.rst"
     ],
     "_render_devdocs": false,
-    "_jinja2_env_vars": { "lstrip_blocks": true, "trim_blocks": true }
+    "_jinja2_env_vars": { "lstrip_blocks": true, "trim_blocks": true },
+    "__prompts__": {
+        "project_name": "Your project’s name",
+        "package_name": "If the Python package name differs from the project name, edit it now",
+        "project_description": "A short one-line description of what your project does",
+        "author_full_name": "Your complete name",
+        "author_email": "The e-mail address your package’s users can contact you under",
+        "github_user": "The GitHub username or org the project is to be published under",
+        "github_repo": "If the repo name should differ from the project name, edit it now",
+        "ide_integration": "Whether to generate IDE configuration files"
+    }
 }