Make version configurable (#5)

README.md

@@ -17,7 +17,13 @@ In order to use GradleMavenizer you have to add the line
 
 `apply from: 'https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/master/gradle-mavenizer.gradle'`
 
-at the <b>very bottom</b> of the *build.gradle* file.
+at the <b>very bottom</b> of the *build.gradle* file. Alternatively, to use a specific release version, add this property to the project (see Releases at the top of the Github page for released versions):
+
+    mavPluginVersion = '1.0'
+
+and add this line to the very bottom of the *build.gradle* file:
+
+    apply from: "https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/${project.mavPluginVersion}/gradle-mavenizer.gradle"`
 
 ## <a name="customization"/>Customization
 GradleMavenizer is highly customizable.

gradle-mavenizer.gradle

@@ -1,8 +1,10 @@
 apply plugin: 'maven-publish'
 
-apply from: 'https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/master/artifact-javadoc-handler.gradle'
-apply from: 'https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/master/artifact-pom-manager.gradle'
-apply from: 'https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/master/utils.gradle'
+githubCommitIdentifier = project.hasProperty('mavPluginVersion') ? project.mavPluginVersion : 'master'
+
+apply from: "https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/${githubCommitIdentifier}/artifact-javadoc-handler.gradle"
+apply from: "https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/${githubCommitIdentifier}/artifact-pom-manager.gradle"
+apply from: "https://raw.githubusercontent.com/sky-uk/gradle-maven-plugin/${githubCommitIdentifier}/utils.gradle"
 
 project.afterEvaluate {
     publishing {