- Refactoring: Reorder path config to group (non-modular-dependent) image

paths together (and correct code comment)
- Docs: CHANGES clarifications/fixes
- Docs: Migrations documents section
- Docs: Add code comment re: use of `extIconsPath` in Mathjax
- Docs: Add JSDoc indicate @this for `ExtensionInitResponse#callback`
- Build: Update build files
- npm: Bump to 3.1.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "svgedit",
-  "version": "3.0.1",
+  "version": "3.1.0",
   "description": "Powerful SVG-Editor for your browser ",
   "main": "dist/index-umd.js",
   "module": "dist/index-es.js",