- Linting: Lint hidden ncurc.js file

- Docs: Add 6.0.0.md migration file
- Docs: Update Contributing, Testing (renamed to Development), Linting and ReleaseInstructions
- Docs: Info on submodules
- npm: Add scripts for updating submodules
- npm: Add `license-badges`, `build-docs`, and `copy` scripts to `prepublishOnly` script
- npm: Bump to 6.0.0

docs/versions/6.0.0.md

@@ -0,0 +1,48 @@
+# Version 6.0.0
+
+This release should require minimal updating.
+
+Besides the breaking changes and license updates, contains miscellanous
+fixes and enhancements, for example:
+
+1. Switching from `localStorage` to `sessionStorage` for the clipboard (@NeilFraser)
+1. PDF export improvements (@cuixiping)
+
+Please see the CHANGES file (or the Git history or Github tracker) for
+more fixes and enhancements.
+
+## Breaking changes (and clarifying license info)
+
+- License:
+    1. The `license` indicated in `package.json` had not included all
+        of the license terms bundled with the package. It now includes them:
+        `(MIT AND Apache-2.0 AND CC-BY-SA-2.0 AND ISC AND LGPL-3.0-or-later AND X11)`
+        A `licenseInfo.json` file has been added with its `filesByLicense`
+        property mapping which files have which licenses. The
+        `bundledRootPackages` property in that file indicates which
+        `devDependencies` packages are actually copied into this repository
+        (so that npm or Git-based hosting services can include them
+        for live use of our editors).
+    1. License: Relicense `ext-mathjax.js` from `Apache-2.0` to `MIT` per
+        permission granted in <https://github.com/josegaert/ext-mathjax/issues/6>
+    1. License: Clarify in `@license` jsdoc that `ext-server_moinsave.js` is
+          "(MIT OR GPL-2.0-or-later)" per subsequent text
+    1. License: Reorder license listing in `jquery.contextMenu.js` so
+          that the more permissive license is noticeable first
+    1. See the new license badges on the README for a summary of
+        the licenses including either bundled devDependencies or all
+        `devDependencies` (we have no direct npm `dependencies` currently).
+        These badges categorize the licenses into different degrees of
+        permissiveness.
+1. `$.pref` - Remove in favor of new `svgEditor.pref` (avoids polluting
+    `jQuery`). (This might be moved to its own module in future.)
+1. `putLocale` (a function called automatically by `svg-editor.js`) no
+    longer checks `pref`. Should not impact average consumers.
+1. Some unused files were removed, i.e., `jquery-ui-1.8.custom.min.js`,
+    some old build/tools closure/yuicompressor code, and the unmaintained
+    chrome-app, firefox-extension, and opera-widget. (However, an updated
+    WebExtensions replacement (or such) for these would be welcome.)
+1. User-facing changes:
+    1. Clipboard: Move clipboard from `localStorage` to `sessionStorage`.
+        Listing as a breaking change as previously held clipboard data
+        will not be restored.