I have just started going through the documentation. On going through the downloads page, I saw that v15.04 has far more content (for e.g. Base Services Source, Code Generator Source, etc) as compared to 15.09. Also, the release data for the all the content in 15.09 shows 30th Sept, whereas some of the content of v15.04 (Lighting Services Framework Source and Lighting Apps Source) has got published on a later date - 23rd Oct.
Does it mean v15.09 is a beta version, whereas v15.04 is the released version?
Thanks and Regards