Add support Android Studio 3.0

Bump to 2.3.1

Author: Quarx2k

README.md

@@ -39,7 +39,7 @@ The default display state is `DisplayState.NONE'.
     <dependency>
         <groupId>it.sephiroth.android.library.imagezoom</groupId>
         <artifactId>imagezoom</artifactId>
-        <version>2.3.0</version>
+        <version>2.3.1</version>
     </dependency>
 
 ##Usage (Gradle)

build.gradle

@@ -2,10 +2,11 @@ buildscript {
     repositories {
         jcenter()
         mavenLocal()
+        google()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.0.0-rc1'
     }
 }
 
@@ -16,5 +17,6 @@ allprojects {
     repositories {
         jcenter()
         mavenCentral()
+        google()
     }
-}
+}

gradle.properties

@@ -1,5 +1,5 @@
 
-VERSION_NAME=2.3.0
+VERSION_NAME=2.3.1
 GROUP=it.sephiroth.android.library.imagezoom
 
 POM_DESCRIPTION=Android ImageView widget with zoom and pan capabilities
@@ -16,8 +16,9 @@ POM_SCM_URL=https://github.com/sephiroth74/ImageViewZoom
 POM_SCM_CONNECTION=scm:[email protected]:sephiroth74/ImageViewZoom
 POM_SCM_DEV_CONNECTION=scm:[email protected]:sephiroth74/ImageViewZoom.git
 
-ANDROID_BUILD_TARGET_SDK_VERSION=25
-ANDROID_BUILD_TOOLS_VERSION=25.0.3
-ANDROID_BUILD_SDK_VERSION=25
+ANDROID_BUILD_TARGET_SDK_VERSION=26
+ANDROID_BUILD_TOOLS_VERSION=26.0.2
+ANDROID_BUILD_SDK_VERSION=26
+ANDROID_SUPPORT_LIB_VERSION=26.1.0
 
 org.gradle.daemon=true

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Tue Jun 27 18:55:51 EEST 2017
+#Sat Oct 21 23:42:36 GMT+06:00 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

library/build.gradle

@@ -33,7 +33,7 @@ android {
 }
 
 dependencies {
-    implementation "com.android.support:support-compat:26.1.0"
+    implementation "com.android.support:support-compat:$ANDROID_SUPPORT_LIB_VERSION"
 }
 
 apply from: rootProject.file('checkstyle.gradle')