I'm a bit late for this announcement, but I decided to do it just in case you missed it: Blender 2.78b has been released and you can download it at www.blender.org.
This is more of a fix release (but still worth it!)
That's right! 2.78b is just an "extra" release between 2.78a and 2.79, so no super amazing new features, but a few fixes have been included... and... optimizations!! Yes! Remember that one we talked about recently? The one in which Cycles speed was super improved, especially for complex renders? If you don't know what I'm talking about, read THIS, because it has been added into 2.78b :)
Thanks to the developers for their amazing work!