ButterKnife 8.0.1

ButterKnife 更新了，增加了资源绑定，并且将 compiler 分离了出来，引用方式做了改变。

buildscript {
  repositories {
    mavenCentral()
   }
  dependencies {
    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
  }
}

apply plugin: 'com.neenbedankt.android-apt'

dependencies {
  compile 'com.jakewharton:butterknife:8.0.1'
  apt 'com.jakewharton:butterknife-compiler:8.0.1'
}

Change Log
==========

Version 8.0.1 *(2016-04-27)*
----------------------------

 * Fix: ProGuard rules now prevent obfuscation of only types which reference ButterKnife annotations.
 * Eliminate some of the generated machinery when referenced from `final` types.


Version 8.0.0 *(2016-04-25)*
----------------------------

 *  `@Bind` becomes `@BindView` and `@BindViews` (one view and multiple views, respectively).
 *  Calls to `bind` now return an `Unbinder` instance which can be used to `null` references. This replaces
    the `unbind` API and adds support for being able to clear listeners.
 *  New: `@BindArray` binds `String`, `CharSequence`, and `int` arrays and `TypeArray` to fields.
 *  New: `@BindBitmap` binds `Bitmap` instances from resources to fields.
 *  `@BindDrawable` now supports a `tint` field which accepts a theme attribute.
 *  The runtime and compiler are now split into two artifacts.

    ```groovy
    compile 'com.jakewharton:butterknife:8.0.0'
    apt 'com.jakewharton:butterknife-compiler:8.0.0'
    ```
 *  New: `apply` overloads which accept a single view and arrays of views.
 *  ProGuard rules now ship inside of the library and are included automatically.
 *  `@Optional` annotation is back to mark methods as being optional.