Add documentation and examples (#145)

* Add documentation

* Justification u8a decoding and json encoding (#146)

* Decode Justifications

* Json encoding for justifications

* Bump deps

* Allow extrinsic length encoding to operate on u8a[] (#148)

* Fix config and move generated doc to a subfolder

* Cleanup extrinsic encoding (#150)

* Cleanup extrinsic encoding

* Removed now-defunct type

* Add uncheckedLength encoding

* Add examples

* Ignore package-lock since we use yarn

* Cleanup examples

* Add gitbook config and some base files for the doc

* Do not make full doc mandatory for now

* Add contributing guide, polish doc and samples

* Update the deps of all samples and add yarn scripts
Fix and regenerate the doc

* Fix Contributing guide

docs/examples/07_transfer_dots/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "07_transfer_dots",
+  "version": "0.1.0",
+  "description": "Example showing how to transfer DOTs",
+  "main": "index.js",
+  "author": "chevdor",
+  "license": "MIT",
+  "scripts": {
+    "clean": "rimraf node_modules",
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "@polkadot/api": "0.29.1",
+    "bn.js": "^4.11.8"
+  },
+  "devDependencies": {
+    "rimraf": "2.6.2"
+  }
+}