createPom use variables

instead of constant strings

Author: Guiorgy

library/build.gradle

@@ -64,16 +64,16 @@ dependencies {
 task createPom {
  pom {
  project {
- groupId 'com.obsez.android.lib.filechooser'
+ groupId GROUP
  artifactId 'android-file-chooser'
  version VERSION_NAME
 
  inceptionYear '2015'
  licenses {
  license {
- name 'The Apache Software License, Version 2.0'
- url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
- distribution 'repo'
+ name POM_LICENCE_NAME
+ url POM_LICENCE_URL
+ distribution POM_LICENCE_DIST
  }
  }
  }