[sam] Improved analogRead speed.

See #1418
Fix robot problems regarding new version of Arduino
Updates to a number of Examples

removed pachube examples, added xively examples. changes to the Servo
examples
Added SERIAL metadata into variant files.
Merge remote-tracking branch 'arduino/master' into ide-1.5.x

Conflicts:
	libraries/Ethernet/examples/XivelyClient/XivelyClient.ino
	libraries/Ethernet/examples/XivelyClientString/XivelyClientString.ino
	libraries/GSM/examples/GSMXivelyClient/GSMXivelyClient.ino
	libraries/GSM/examples/GSMXivelyClientString/GSMXivelyClientString.ino
	libraries/Servo/examples/Knob/Knob.ino
	libraries/Servo/examples/Sweep/Sweep.ino
	libraries/WiFi/examples/WiFiXivelyClient/WiFiXivelyClient.ino
	libraries/WiFi/examples/WiFiXivelyClientString/WiFiXivelyClientString.ino
Merge remote-tracking branch 'arduino/ide-1.5.x' into ide-1.5.x
Merge branch 'master' into serial-variant
Updated listfiles SD example

Updated description of the file
Updated Blink without delay example

Changed variable to unsigned long.
Added SERIAL metadata into variant files.
Modified LCD custom character example

moved lcd.begin() to the beginnng of the setup() and fixed an issue
that prevented the example from compiling. When calling lcd.write()
with an argument of 0, the 0 must be cast a s a byte.
Updated KeyboardMessage example
Fix SERIAL_* metadata in Arduino Ethernet variant
Merge branch 'master' into serial-variant
Merge remote-tracking branch 'arduino/master'
Merge branch 'master' into ide-1.5.x

Conflicts:
	build/shared/examples/02.Digital/BlinkWithoutDelay/BlinkWithoutDelay.ino
	build/shared/examples/09.USB/Keyboard/KeyboardMessage/KeyboardMessage.ino
	libraries/LiquidCrystal/examples/CustomCharacter/CustomCharacter.ino
	libraries/SD/examples/listfiles/listfiles.ino
Merge pull request #1634 from cmaglie/adc-fix

Improved ADC speed on Arduino Due
Updated language file.
Changed "Copy error" message to "Copy error messages".
Removed redundant LED_BUILTIN define in Yun variant.
Merge pull request #1659 from X-Y/master

Fix robot problems regarding new version of Arduino