Fixed min and max frequency in HackrfSource. Fixed bug in scrolling and scaling code.
Allow frequency input to be either in Hz or in MHz
Added setting for color map types. New color map types: JET, HOT, GQRX
Optimized color map type setter method
optimized drawing: only draw once per pixel!
Optimized processing loop by reusing buffer for the magnitude calculation
Provide UP navigation from the settings activity
Merge branch 'master' into optimize_drawing
Added fft drawing type setting (bars or line)
Uploading latest binary (version 1.03)