Iota wallet (#4314)

* added iota documentation\

* removed ruby version file\

* changed logo

* minor changes to documentation

* re-added ruby version file

* ✏️ Minor grammar changes

.ruby-version

@@ -1 +1 @@
-2.4.1
+2.4.1

source/_components/iota.markdown

@@ -0,0 +1,62 @@
+---
+layout: page
+title: "IOTA"
+description: "Instructions on how to integrate IOTA wallets with Home Assistant."
+date: 2017-12-31 13:29
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: iota.png
+ha_category: Finance
+ha_release: 0.61
+ha_iot_class: "Cloud Polling"
+---
+
+[IOTA](http://iota.org/) is a new blockless distributed ledger which is scalable, lightweight and makes it possible to transfer value without any fees. 
+
+The `iota` component displays various details (e.g., the balance, node attributes) of IOTA wallets.
+
+```yaml
+# configuration.yaml example
+iota:
+  iri: https://testnet140.tangle.works:4434
+  wallets:
+    - name: Default Wallet
+      seed: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+```
+
+{% configuration %}
+iri:
+  description: Url of the IRI node
+  required: true
+  type: string
+testnet:
+  description: Flag for indicating testnet
+  required: false
+  default: No testnet (false)
+  type: bool
+wallets:
+  description: List of IOTA wallets
+  required: true
+  type: list
+  keys:
+    name:
+      description: Name of the wallet
+    seed:
+      description: Seed of the wallet
+{% endconfiguration %}
+
+A full configuration example could look the one below:
+
+```yaml
+# Full example
+iota:
+  iri: https://testnet140.tangle.works:4434
+  testnet: true
+  wallets:
+    - name: Default Wallet
+      seed: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+    - name: Exchange Wallet
+      seed: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+```