Fix #5 Add missing sonar.basePlugin property

Author: racodond

README.md

@@ -32,7 +32,8 @@ This sample plugin is designed to help you get started writing your own plugin a
 * Create a [standard SonarQube plugin](https://docs.sonarqube.org/display/DEV/Build+Plugin) from scratch or start from this sample plugin
 * Attach this plugin to the SonarQube CSS / SCSS / Less plugin through the [POM](sonar-csscustomrules-plugin/pom.xml):
   * Add the [dependency](sonar-csscustomrules-plugin/pom.xml#L33) to the CSS / SCSS / Less plugin
-  * [Require a minimal version of the CSS / SCSS / Less plugin](sonar-csscustomrules-plugin/pom.xml#L22)
+  * [Base the plugin on the CSS / SCSS / Less plugin](sonar-csscustomrules-plugin/pom.xml#L22)
+  * [Require a minimal version of the CSS / SCSS / Less plugin](sonar-csscustomrules-plugin/pom.xml#L23)
 * Implement the following extension points:
   * [Plugin](http://javadocs.sonarsource.org/latest/apidocs/index.html?org/sonar/api/Plugin.html) as in [`MyCssCustomRulesPlugin.java`](sonar-csscustomrules-plugin/src/main/java/org/sonar/css/MyCssCustomRulesPlugin.java)
   * [RulesDefinition](http://javadocs.sonarsource.org/latest/apidocs/index.html?org/sonar/api/server/rule/RulesDefinition.html) as in [`MyCssCustomRulesDefinition.java`](sonar-csscustomrules-plugin/src/main/java/org/sonar/css/MyCssCustomRulesDefinition.java)

pom.xml

@@ -15,7 +15,7 @@
   <packaging>pom</packaging>
 
   <name>SonarQube CSS / SCSS / Less Custom Rules Plugin</name>
-  <description>Sample plugin that defines SonarQube custom rules for CSS / SCSS / Less files</description>
+  <description>Sample plugin that defines custom CSS / SCSS / Less rules</description>
   <url>https://github.com/racodond/sonar-css-custom-rules-plugin</url>
   <inceptionYear>2016</inceptionYear>
   <organization>

sonar-csscustomrules-plugin/pom.xml

@@ -13,12 +13,13 @@
   <packaging>sonar-plugin</packaging>
 
   <name>CSS / SCSS / Less Custom Rules Plugin</name>
-  <description>Sample plugin that defines SonarQube custom rules for CSS / SCSS / Less files</description>
+  <description>Sample plugin that defines custom CSS / SCSS / Less rules</description>
   <url>https://github.com/racodond/sonar-css-custom-rules-plugin</url>
 
   <properties>
     <sonar.pluginName>CSS / SCSS / Less Custom Rules</sonar.pluginName>
     <sonar.pluginClass>org.sonar.css.MyCssCustomRulesPlugin</sonar.pluginClass>
+    <sonar.basePlugin>css</sonar.basePlugin>
     <sonar.requirePlugins>css:4.13</sonar.requirePlugins>
   </properties>