Fix typo, add mode keyword for ESP8266WiFi, remove .bss section from sketch flash size calculation

NOTES

@@ -13,7 +13,7 @@ What works
 - analogRead(0) reads the value of the ADC channel connected to the TOUT pin.
 
 - pin interrupts (attachInterrupt, detachInterrupt)
-	Interrupts may be attach to any GPIO pin. Standard Arduino interrupt types are 
+	Interrupts may be attached to any GPIO pin. Standard Arduino interrupt types are 
 	supported: CHANGE, RISING, FALLING.
 
 - shiftIn, shiftOut

hardware/arduino/esp8266/libraries/ESP8266WiFi/keywords.txt

@@ -22,6 +22,7 @@ Server	KEYWORD1
 
 firmwareVersion	KEYWORD2
 status	KEYWORD2
+mode	KEYWORD2
 connect	KEYWORD2
 write	KEYWORD2
 available	KEYWORD2

hardware/arduino/esp8266/platform.txt

@@ -75,7 +75,7 @@ recipe.objcopy.hex.pattern="{compiler.tools.path}{compiler.esptool.cmd}" -eo "{b
 
 ## Compute size
 recipe.size.pattern="{compiler.path}{compiler.size.cmd}" -A "{build.path}/{build.project_name}.elf"
-recipe.size.regex=^(?:\.text|\.data|\.bss|\.rodata|\.irom0\.text|)\s+([0-9]+).*
+recipe.size.regex=^(?:\.text|\.data|\.rodata|\.irom0\.text|)\s+([0-9]+).*
 #recipe.size.regex.data=^(?:\.data|\.bss|\.noinit)\s+([0-9]+).*
 #recipe.size.regex.eeprom=^(?:\.eeprom)\s+([0-9]+).*