Fix 'coresponding' english typo on start screen
WIP: Add some margin to the user textview text
Add controllers at subapp' level
Add special-casing for the size of the FlowerHowTo WebView to make it work under all supported iOS versions
Slightly rearrange calibration and parameters layouts to fit in iOS7
Avoid a full-screen warning
Release 1.7 with minimal iOS7 adaptations