Merge igrr/esp8266 into esp8266

  remove the need to set programmer, by setting upload tool
  remove trailing whitespace

Conflicts:
	hardware/esp8266com/esp8266/boards.txt

Author: igrr

hardware/esp8266com/esp8266/boards.txt

@@ -15,6 +15,7 @@ esp01.build.board=ESP8266_ESP01
 esp01.build.core=esp8266
 esp01.build.variant=esp01
 
+esp01.upload.tool=esptool
 esp01.menu.UploadSpeed.115200=115200
 esp01.menu.UploadSpeed.115200.upload.speed=115200
 esp01.menu.UploadSpeed.9600=9600