added an instructions button on the main screen and made a segue from it leading to the welcome screen
updated all the tab bar icons to perfection!
added a conditional branch to blocks of code available only in iOS 7:
    if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
}

should also work now properly on iOS 6 devices.
*perfected the design of the settings/results tabs
*added a UIViewCollection in ResultsViewController to display the result in every “cell” (ResultView)
*updated the storyboard respectively
*set the MenuTabBarController as the initial controller
*added default_bg.png to the project and set it to be the launch image
added a swipe gesture recogniser to the ResultsViewController but commented out all it’s code (there was a bug..)
aaa
Merge remote-tracking branch 'origin/michael_new' into or
added small changes to the algorithm that should give better result after calibration