Controller. Remove common definitions. Harmonize declaration order.

Included Portuguese language

Assume SERIAL_PORT 0 if not defined. Collapse un-numbered register
special case. Clarify comments.

This change makes the choice of serial port configurable so that
wireless capability can be easily added by connecting Bluetooth modules
(such as BlueSmirf or JY-MCU) to the expansion port pins.

Change required after pulling from ErikZalm.

Took out the ifdef when I split 1.4 out and forgot to permanently
define it for <=1.3.

This reverts commit cb02c2f9d8.

The number of steps per mm often contains 4 digits before the decimal point and does not require precision greater than 0.1

It would seem that the pattern matches do not work when the source
file is created when make is running. The result of this is that it is
necessary to run "make" twice to build the firmware.

This adds an explicit rule without a pattern match for building
applet/Marlin.cpp it corrects the make behaviour at the cost of adding
a little redundancy in the Makefile.

Dialogs from M119 translated, and "Set Preheat" dialogs adapted to the
screen size.

Changed to report on individual lines with "TRIGGERED" or "open" instead of "H" or "L" on one line as H&L could be confused with logic levels High and Low which may be wrong if using inverted logic.  Added strings to language.h.

Fixed typo "deu" in English language that was fixed in #134 but got added back in via 9f7f7354f5

fixes #246
Added statements to set the limit switch positions to the maximum travel if homing in the positive direction as well as bed center at (0,0) if defined.
Relocated code based on feedback.

Added statements to set the limit switch positions to the maximum travel if homing in the positive direction as well as bed center at (0,0) if defined.

Added function 'setTargetedHotend' that turns into a function an operation repeated 3 times through the M-codes processing.

This modification saves a few bytes that can be used to add support for new commands.