Add license and badges

LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2016 Florent Morselli
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -2,6 +2,9 @@
 
 With this query builder you can build queries for Flux. Flux is a powerful open source query language created by the makers of InfluxDB. See https://www.influxdata.com/products/flux/
 
+[![Latest Stable Version](http://poser.pugx.org/arendsen/fluxquerybuilder/v)](https://packagist.org/packages/arendsen/fluxquerybuilder)
+[![License](http://poser.pugx.org/arendsen/fluxquerybuilder/license)](https://packagist.org/packages/arendsen/fluxquerybuilder) 
+[![PHP Version Require](http://poser.pugx.org/arendsen/fluxquerybuilder/require/php)](https://packagist.org/packages/arendsen/fluxquerybuilder)
 
 ## Documentation 
 The documentation of this project is available in the [docs folder](docs/00-index.md).
@@ -25,4 +28,8 @@ Run the following commands to check and fix the coding style. We're using the PS
 ```
 composer check
 composer format
-```
+```
+
+## Licence
+
+This software is released under the [MIT licence](LICENSE).

docs/functions/addGroup.md

@@ -28,7 +28,7 @@
           <li>
             by: Group by columns defined in the columns parameter.
           </li>
-          <li>except: Group by all columns except those in defined in the columns parameter.
+          <li>except: Group by all columns except those defined in the columns parameter.
           </li>
         </ul>
       </td>

docs/functions/addMean.md

@@ -16,7 +16,7 @@
       <td>column</td>
       <td>Yes</td>
       <td>string</td>
-      <td>Column to use to compute means. Default is '_value'.</td>
+      <td>Column to use to compute 'means'. Default is '_value'.</td>
     </tr>
   </tbody>
 </table>