add markdown getting started page to api docs. TODO section 3

doc/api/api.raml

@@ -4,6 +4,12 @@ title: Metamaps
 version: v2.0
 baseUri: https://metamaps.cc/api/v2
 mediaType: application/json
+protocols: [ HTTPS ]
+documentation:
+  - title: Getting Started
+    content: !include pages/getting-started.md
+  - title: Endpoints
+    content: ""
 
 securitySchemes:
   oauth_2_0: !include securitySchemes/oauth_2_0.raml

doc/api/pages/getting-started.md

@@ -0,0 +1,43 @@
+[Skip ahead to the endpoints.](#endpoints)
+
+There are three ways to log in: cookie-based authentication, token-based authentication, or OAuth 2.
+
+### 1. Cookie-based authentication
+
+One way to access the API is through your browser. Log into metamaps.cc normally, then browse manually to https://metamaps.cc/api/v2/user/current. You should see a JSON description of your own user object in the database. You can browse any GET endpoint by simply going to that URL and appending query parameters in the URI.
+
+To run a POST or DELETE request, you can use the Fetch API. See the example in the next section.
+
+### 2. Token-based authentication
+
+If you are logged into the API via another means, you can create a token. Once you have this token, you can append it to a request. For example, opening a private window in your browser and browsing to `https://metamaps.cc/api/v2/user/current?token=...token here...` would show you your current user, even without logging in by another means.
+
+To get a list of your current tokens, you can log in using cookie-based authentication and run the following fetch request in your browser console (assuming the current tab is on some page within the `metamaps.cc` website.
+
+```
+fetch('/api/v2/tokens', {
+  method: 'GET',
+  credentials: 'same-origin' // needed to use the cookie-based auth
+}).then(response => {
+  return response.json()
+}).then(console.log).catch(console.error)
+```
+
+If this is your first time accessing the API, this list wil be empty. You can create a token using a similar method:
+
+```
+fetch('/api/v2/tokens', {
+  method: 'POST',
+  credentials: 'same-origin'
+}).then(response => {
+  return response.json()
+}).then(payload => {
+  console.log(payload)
+}).catch(console.error)
+```
+
+`payload.data.token` will contain a string which you can use to append to requests to access the API from anywhere.
+
+### 3. OAuth 2 Authentication
+
+TODO