get() added function to get partial system info

docs/general.html

@@ -174,6 +174,62 @@
                     <td>X</td>
                     <td>all data at once<br>Specify services and interfaces to monitor<br>Defaults to first external network interface<br>Pass "*" for ALL services (linux/win only)<br>Pass "*" for ALL network interfaces</td>
                   </tr>
+                  <tr>
+                    <td>si.get(valueObject,cb)</td>
+                    <td>{...}</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>get partial data at once<br>Specify return object for all<br>values that should be returned.<br>See example:</td>
+                  </tr>
+                  <tr class="example">
+                    <td></td>
+                    <td colspan="7">
+                      <h5>Example</h5>
+                      <pre><code class="js">const si = require('systeminformation');
+
+// define all values, you want to get back
+valueObject = {
+  cpu: '*',
+  osInfo: 'platform, release',
+  system: 'model, manufacturer'
+}
+
+si.get(valueObject).then(data => console.log(data));</code></pre class="example">
+<pre class="example">
+{
+  cpu: {
+    manufacturer: 'Intel®',
+    brand: 'Core™ i7-8569U',
+    vendor: 'GenuineIntel',
+    family: '6',
+    model: '142',
+    stepping: '10',
+    revision: '',
+    voltage: '',
+    speed: '2.80',
+    speedmin: '2.80',
+    speedmax: '2.80',
+    governor: '',
+    cores: 8,
+    physicalCores: 4,
+    processors: 1,
+    socket: '',
+    cache: { l1d: 32768, l1i: 32768, l2: 262144, l3: 8388608 }
+  },
+  osInfo: {
+    platform: 'darwin',
+    release: '10.15.4'
+  },
+  system: {
+    model: 'MacBookPro15,2',
+    manufacturer: 'Apple Inc.'
+  }
+}
+</pre>
+                  </tr>
                 </tbody>
               </table>
               <p><strong>Static data</strong> is all hardware related (or more or less constant) data like system, baseboard, bios, OS, versions, cpu, network interfces, memory and disk layout</p>