Limit Switch locations based on MIN/MAX limits and homing direction

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.

Slight modification for byte savings

Binary representation for characters in ultraldc.pde

Fix M81 not working reliably on Gen7

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.

The joris' char drawins are expressed in binary so to show their content's in a more visual fashion.

This is not a code modification as much as a readibility modification.

Some discussion of the issue is here http://forums.reprap.org/read.php?181,118329,page=1

Conflicts:

	Marlin/Configuration.h

Missing #else in temperature.cpp prevented reading bed temp when TEMP_BE...

Added PDF file containing Menu Tree for documentation purposes.

Update Marlin/pins.h

motor current and microstepping pins.

Gen7 1.4 uses very different pin assignments, might as well make a new
section and remove some of the conditionals from each. It's easier to change
your pin assingment this way if like me you don't wire it exactly to plan.

Some dialogs corrected and Default language set to 1

Some dialogs are corrected

Long filename support for LCD display

Implemented support for KILL_PIN / Fixed compilation errors for incomplete/bad translations

PLEASE BE MORE CAREFUL WHEN SUBMITTING NEW TRANSLATIONS

When you add new menu items / messages always copy them to ALL
languages (just use english)

The cli(); at the start of the kill() function also stops the internal
arduino timer which stops updating of millis() which prevents the
display of the "KILLED." message.
The new function updates the display directly without checking any
timers.

Added new function to the LCD menu.  Preheat settings now adjustable and can be stored

- related bug reports: Issue #201, Issue #213

- removed several multiple definitions of same message
- fixed definition of missing messages in german and spanish
- tweaked german translation (a lot)
- added note about changing and testing this file

Fixed broken Language file and pre-heat ABS and PLA options

Spanish language included in the language.h file

Spanish language included. It features the LCD screen messages and a small part of the Serial messages.