title: Multiple dex files define Landroid/support/annotation/AnimRes after adding StikkyHeader android project
body: <p>After i added the 'com.github.carlonzo.stikkyheader:core:0.0.2-SNAPSHOT' library in my gradle file Im getting the error on build:</p>
  
  <pre><code>com.android.dex.DexException: Multiple dex files define Landroid/support/annotation/AnimRes;
          at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:594)
          at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:552)
          at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:533)
          at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:170)
          at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)
          at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:439)
          at com.android.dx.command.dexer.Main.runMonoDex(Main.java:287)
          at com.android.dx.command.dexer.Main.run(Main.java:230)
          at com.android.dx.command.dexer.Main.main(Main.java:199)
          at com.android.dx.command.Main.main(Main.java:103)
  </code></pre>
  
  <p>here is my gradle.build file:</p>
  
  <pre><code>buildscript {
      repositories {
          mavenCentral()
          maven { url 'http://repo1.maven.org/maven2' }
          maven { url 'http://download.crashlytics.com/maven' }
          maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
  
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:1.0.0'
          classpath 'com.crashlytics.tools.gradle:crashlytics-gradle:1.+'
  
      }
  }
  apply plugin: "eclipse"
  apply plugin: 'com.android.application'
  apply plugin: 'crashlytics'
  repositories {
      mavenCentral()
      maven { url 'http://repo1.maven.org/maven2' }
      maven { url 'http://download.crashlytics.com/maven' }
      maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
  }
  android {
  
      compileSdkVersion 21
      buildToolsVersion "19.1.0"
  
      dependencies {
          compile fileTree(dir: 'libs', include: '*.jar')
          compile project(":libraries:google-play-services-lib")
          compile project(":libraries:pager-indicator-lib")
          compile project(":libraries:apphance-library-1.9.11")
          compile project(":libraries:dialog-manager-lib")
          compile 'com.crashlytics.android:crashlytics:1.+'
  
      }
  
      defaultConfig {
          minSdkVersion 14
          targetSdkVersion 21
          testInstrumentationRunner "android.test.InstrumentationTestRunner"
      }
  
      signingConfigs {
          release {
              storeFile file(RELEASE_KEYSTORE_FILE)
              storePassword System.getenv("PASSWORD_KEYSTORE")
              keyAlias System.getenv("ALIAS_KEYSTORE_JB")
              keyPassword System.getenv("PASSWORD_KEYSTORE")
          }
  
          debug {
              storeFile file(DEBUG_KEYSTORE_FILE_LOCAL)
          }
  
          beta {
              storeFile file(DEBUG_KEYSTORE_FILE_LOCAL)
          }
  
      }
  
      buildTypes {
          debug {
              debuggable true
              signingConfig android.signingConfigs.debug
              applicationIdSuffix ".debug"
          }
          release {
              signingConfig signingConfigs.release
          }
  
          beta {
              debuggable true
              signingConfig android.signingConfigs.debug
              applicationIdSuffix ".beta"
          }
      }
  
      sourceSets {
          main {
              manifest.srcFile 'AndroidManifest.xml'
              java.srcDirs = ['src']
              resources.srcDirs = ['src']
              aidl.srcDirs = ['src']
              renderscript.srcDirs = ['src']
              res.srcDirs = ['res']
              assets.srcDirs = ['assets']
          }
  
          release {
              res.srcDirs = ['res_release']
          }
  
          beta {
              res.srcDirs = ['res_beta']
          }
  
          instrumentTest.setRoot('test')
          instrumentTest {
              java.srcDirs = ['test']
          }
      }
  
      lintOptions {
          abortOnError false
      }
  }
  task wrapper(type: Wrapper) {
      gradleVersion = '1.11'
  }
  dependencies {
  //    compile 'com.android.support:support-annotations:20.0.0'
      compile 'com.mixpanel.android:mixpanel-android:4.5.2'
      compile 'com.android.support:multidex:1.0.0'
      compile ('com.facebook.android:facebook-android-sdk:3.22.0')
              {
                      exclude module: 'support-v4'
              }
  
      compile ('com.github.carlonzo.stikkyheader:core:0.0.2-SNAPSHOT')
              {
                  exclude module: 'support-v4'
              }
  }
  </code></pre>
  
  <p>Any ideas on how to fix it ? Thanks</p>