release(2.5.1) : release new version 2.5.1

-- missing version code update

Author: fchauveau

gradle.properties

@@ -17,7 +17,7 @@
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 VERSION_NAME=2.5.1
-VERSION_CODE=250
+VERSION_CODE=251
 GROUP=com.code-troopers.betterpickers
 
 ANDROID_BUILD_MIN_SDK_VERSION=9