Merge pull request #54 from raivisr/master

Updated .gitignore and cleaned up some PSoC Creator artifacts.
Add a correction factor for voltage based on current usage, fixing #55.
Added uvlo command, fixing #22
Fix set command to report value when used with 0 arguments, and add uvlo range checking
Release v1.9
Fix version number for 1.9
Updated font with new ohms symbol
Flashing backlight in case of OS error
on/off commands to toggle load
Merge pull request #60 from zardam/pr56

on/off commands and flashing backlight in case of OS error