disable lint in release builds + minor code style update

app/build.gradle

@@ -36,6 +36,11 @@ android {
         debug.java.srcDirs += 'src/debug/kotlin'
         release.java.srcDirs += 'src/release/kotlin'
     }
+
+    lintOptions {
+        checkReleaseBuilds false
+        abortOnError false
+    }
 }
 
 ext {
@@ -50,6 +55,7 @@ dependencies {
     compile 'com.android.support:multidex:1.0.1'
     compile 'com.google.code.gson:gson:2.8.0'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+
     debugCompile "com.squareup.leakcanary:leakcanary-android:$leakCanaryVersion"
     releaseCompile "com.squareup.leakcanary:leakcanary-android-no-op:$leakCanaryVersion"
 }

app/src/debug/kotlin/com/simplemobiletools/calendar/BuildVariantApplication.kt

@@ -5,10 +5,8 @@ import com.squareup.leakcanary.LeakCanary
 open class BuildVariantApplication : BaseApp() {
     override fun onCreate() {
         super.onCreate()
-        LeakCanary.install(this);
+        LeakCanary.install(this)
     }
 
-    override fun shouldInit(): Boolean {
-        return !LeakCanary.isInAnalyzerProcess(this)
-    }
+    override fun shouldInit() = !LeakCanary.isInAnalyzerProcess(this)
 }

app/src/main/kotlin/com/simplemobiletools/calendar/BaseApp.kt

@@ -3,7 +3,5 @@ package com.simplemobiletools.calendar
 import android.support.multidex.MultiDexApplication
 
 abstract class BaseApp : MultiDexApplication() {
-    open fun shouldInit(): Boolean {
-        return true
-    }
+    open fun shouldInit() = true
 }