Display fix in tutorial, SDK update

Added user feedback after submit, more bug fixes

Fixes a bug with pH value not sent to pml

Bug fixes

Improved layout, helper tools.
Quick Forel Ule picker (using the camera)
Better sign up / log in experience.
Bug fixes

My measurements
Improved GPS
Map support
Offline support

GPS accuracy fix
Layout improvements

Fixes an iOS related  issue with sending data to the PML back end