Merge pull request #30 from brarcher/pre-v0.4

Update for release v0.4

app/build.gradle

@@ -14,8 +14,8 @@ android {
         applicationId "protect.card_locker"
         minSdkVersion 17
         targetSdkVersion 23
-        versionCode 3
-        versionName "0.3"
+        versionCode 4
+        versionName "0.4"
     }
     buildTypes {
         release {
@@ -60,4 +60,4 @@ task findbugs(type: FindBugs, dependsOn: assembleDebug) {
         xml.enabled = false
         html.enabled = true
     }
-}
+}