added get_fan_speed(), removed hard coded fan pwm_pos from ui.cpp
added EXTRUDER_FAN_COOL_TEMP to define extruder cool down temperature
Merge pull request #117 from lajos/fan_pwm

added get_fan_speed(), removed hard coded fan pwm_pos from ui.cpp
Merge pull request #118 from lajos/ext_cool_temp

added EXTRUDER_FAN_COOL_TEMP to define extruder cool down temperature
Fixed compile issue, fixed delta printer bug with feedrate multiplyer.
Merge pull request #2 from repetier/master

update