Kickoff 2015.05 cycle

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

Makefile

@@ -28,7 +28,7 @@
 all:
 
 # Set and export the version string
-export BR2_VERSION := 2015.02
+export BR2_VERSION := 2015.05-git
 
 # Check for minimal make version (note: this check will break at make 10.x)
 MIN_MAKE_VERSION = 3.81