R-counter now constant to save memory (depends on REFin and PDFFreq; both do not change during sweep)
several bugfixes and improvements in string handling of serial input buffer; some new switch chain commands; Ethernet deactivated for now (not enough memory)
minor commit
added PLL register calculation in Matlab (for testing); bugfixes in RADIO_TEMPLATES.ino; more extensive tests in radio_templates_test.m