PP version in ReadMe_upgrade

[phild]

In the doc folder of final PP1.5, in the ReadMe_upgrade file, the version mentionned is
4- UPGRADE from Version 1.5.x to PixelPost 1.5RC
Made me check whether I was really working on the final version or on an older RC package…

>edit : same thing in the install.php file
Welcome to Pixelpost 1.5rc upgrade!

[blinking8s]

lots of small things slip by, its a pain but down the road we hope to cut this down so its easier to change the 35 million small things.

thanks for the heads up.