Update version numbers for v2.1.5 final release

Author: codinguser

CHANGELOG.md

@@ -1,6 +1,6 @@
 Change Log
 ===============================================================================
-Version 2.1.5 *(2017-04-01)*
+Version 2.1.5 *(2017-04-04)*
 ----------------------------
 * Fixed: Widget button for placeholder accounts tries to create transactions 
 * Fixed: App crashes when screen orientation changes while viewing reports (#633)

app/build.gradle

@@ -7,7 +7,7 @@ apply plugin: 'android-apt'
 def versionMajor = 2
 def versionMinor = 1
 def versionPatch = 5
-def versionBuild = 3
+def versionBuild = 4
 
 def buildTime() {
     def df = new SimpleDateFormat("yyyyMMdd HH:mm 'UTC'")