Merge pull request #41 from raivisr/master

uart_printf made usable from all over the code
Output current setpoint over serial when adjusted via UI, fixing #19. Also remove obsolete high/low range current setting
Remove user-specific file
Add range checking for current set command fixing #38; fix set responses from UI to be in mA not uA
Make max uart_printf line length 80, and allocate buffer on heap
Release v1.8