Fixes some Typos in the Documentation (#678)

* Fixing typo on development_enviornment.md

* Fixing various typos throughout the docs, it's not much but it's honest work

docs/frontend/custom-ui/lovelace-custom-card.md

@@ -243,7 +243,7 @@ Your card can also define a `getStubConfig` method that returns a default card c
 Home Assistant will call the `setConfig` method of the config element on setup.
 Home Assistant will update the `hass` property of the config element on state changes, and the `lovelace` element, which contains information about the lovelace configuration.
 
-Changes to the configuration are comunicated back to lovelace by dispatching an `config-changed` event with the new configuration in it's detail.
+Changes to the configuration are communicated back to lovelace by dispatching an `config-changed` event with the new configuration in it's detail.
 
 To have your card displayed in the card picker dialog in Lovelace, add an object describing it to the array `window.customCards`. Required properties of the object are `type` and `name` (see example below).
 

docs/frontend/custom-ui/registering-resources.md

@@ -8,4 +8,4 @@ Resources can be registered from the "Resources" tab of the Lovelace Configurati
 
 This tab is only available when the active user's profile has "advanced mode" enabled.
 
-![Screenshot of the Advanced Mode selector found on the Profile page](/img/en/frontend/lovelace-ui-profile-advanced-mode.png)
+![Screenshot of the Advanced Mode selector found on the Profile page](/img/en/frontend/lovelace-ui-profile-advanced-mode.png)