Pull in vuepress foir docs (as opposed to gitbook) (#742)

* Pull in latest @polkadot/dev, cleanup existing *.html

* Cleanups (old gitbook interfaces)

* Bump, WIP

* Ready for testing

* Update examples

* Include source

* Cleanup links

* Adjust links

* Add typedoc exclusions

* Default classes from class files

* Adjust imports

* Adjust config

* Re-add types split

* Update links to substrate interfaces

* Anchors for metadata

* Adjust links

* Restore HTML (to be deleted on CI)

* Bump deps

* Re-gen yarn.lock

* Remove a in links

* Adjust interfaces

package.json

@@ -24,7 +24,7 @@
   "devDependencies": {
     "@babel/core": "^7.3.3",
     "@babel/register": "^7.0.0",
-    "@polkadot/dev": "^0.24.6",
+    "@polkadot/dev": "^0.25.3",
     "@polkadot/ts": "^0.1.53"
   }
 }