Actuators.LED4R: added preliminary driver.
Removed debug code.
Removed debug code.
Added 'using namespace' instead of qualifying function calls.
Fixed function call.
Initialized internal variables in constructor.
Actuators.LED4R: improved driver, working on ADC readings.
Actuators.LED4R: added development configuration file.
For loop should be a while and client list must be cleared in onResourceRelease().

This commit closes #2220.
Actuators.LED4R: added missing functionality.
Merge branch 'feature/led4r'
UCTK Bootloader: added argument to turn on/off verbose mode.
UCTK Interface UART: do not open device in constructor, reset baud rate on re-open.
UCTK Interface: getName() will no longer use a cached name.
Actuators.LED4R: added proper onResourceAcquisition().
Sensors.LIMU: open interface onResourceAcquisition().
Added very simple program to flash UCTK devices.
UCTK: simplified interface.
Merge branch 'master' into feature/trex_rehab