Add api procedure to get the application version

docs/api-json-rpc.markdown

@@ -144,6 +144,32 @@ Array
 Procedures
 ----------
 
+### getVersion
+
+- Purpose: **Get the application version**
+- Parameters: none
+- Result: **version** (Example: 1.0.12, master)
+
+Request example:
+
+```json
+{
+    "jsonrpc": "2.0",
+    "method": "getVersion",
+    "id": 1661138292
+}
+```
+
+Response example:
+
+```json
+{
+    "jsonrpc": "2.0",
+    "id": 1661138292,
+    "result": "1.0.13"
+}
+```
+
 ### getTimezone
 
 - Purpose: **Get the application timezone**

jsonrpc.php

@@ -418,6 +418,10 @@ $server->register('getTimezone', function() use ($container) {
     return $container['config']->get('application_timezone');
 });
 
+$server->register('getVersion', function() use ($container) {
+    return APP_VERSION;
+});
+
 /**
  * Parse incoming requests
  */

tests/functionals/ApiTest.php

@@ -39,7 +39,7 @@ class Api extends PHPUnit_Framework_TestCase
     {
         $this->client = new JsonRPC\Client(API_URL);
         $this->client->authentication('jsonrpc', API_KEY);
-        //$this->client->debug = true;
+        // $this->client->debug = true;
     }
 
     private function getTaskId()
@@ -53,8 +53,12 @@ class Api extends PHPUnit_Framework_TestCase
 
     public function testGetTimezone()
     {
-        $timezone = $this->client->getTimezone();
-        $this->assertEquals('Europe/Paris', $timezone);
+        $this->assertEquals('Europe/Paris', $this->client->getTimezone());
+    }
+
+    public function testGetVersion()
+    {
+        $this->assertEquals('master', $this->client->getVersion());
     }
 
     public function testRemoveAll()