github: Issue template for new plugin

Signed-off-by: John Andersen <john.s.andersen@intel.com>

.github/ISSUE_TEMPLATE/new_plugin.md

@@ -0,0 +1,52 @@
+---
+name: New Plugin
+about: I've created a new plugin for DFFML
+title: 'plugin: new: '
+labels: documentation
+assignees: ''
+
+---
+
+I've created a new plugin for DFFML!
+
+The package name on PyPi is .... / GitHub repo is ....
+
+It provides Sources / Models / Operations / Data Flow
+
+The following are it's `entry_points`
+
+```python
+    # (copy paste yours here, example is from dffml/setup.py)
+    entry_points={
+        'dffml.source': [
+            'csv = dffml.source.csv:CSVSource',
+            'json = dffml.source.json:JSONSource',
+            'memory = dffml.source.memory:MemorySource',
+        ],
+    }
+```
+
+Here is what each one does (in rST, leave the \`\`\` so it can be copy pasted)
+
+`*Community*` means that you are a member of the DFFML community that is
+contributing a plugin. If there is a plugin maintained within the DFFML git repo
+that needs to be added to the documentation it will be `*Core*`.
+
+```
+CSV
+---
+
+*Community*
+
+Loads and saves Repos from CSV files.
+
+**Args**
+
+- filename: String
+
+  - Path to CSV file
+
+- readonly: Boolean
+
+  - True if the file should not be written back to
+```