Cleanup some JS files and webpack info

public/assets/vendor/leaflet/ISSUE_TEMPLATE.md

@@ -0,0 +1,25 @@
+<!--
+Thanks for taking the time to open an issue! Help us have good bug requests:
+
+- [ ] I'm reporting a bug, not asking for help; support questions like "How can I do X with Leaflet?" will be closed (use [Stack Overflow](http://stackoverflow.com/) or [gis.stackexchange.com](http://gis.stackexchange.com/) for questions)
+- [ ] I've looked at the [documentation](http://leafletjs.com/reference-1.0.3.html) to make sure the behaviour is documented and expected
+- [ ] I'm sure this is a Leaflet code issue, not an issue with my own code nor with the framework I'm using (Cordova, Ionic, Angular, React…)
+- [ ] I've searched through the issues to make sure it's not yet reported
+-->
+
+## How to reproduce
+
+- Leaflet version I'm using:
+- Browser (with version) I'm using:
+- OS/Platform (with version) I'm using:
+- step 1
+- step 2
+
+## What behaviour I'm expecting and which behaviour I'm seeing
+
+## Minimal example reproducing the issue
+
+- [ ] this example is as simple as possible
+- [ ] this example does not rely on any third party code
+
+Using http://playground-leaflet.rhcloud.com/ or any other jsfiddle-like site.