Latest upstream changes

Trivial spelling correction

Introduced lcd_strlen() and lcd_strlen_P().
Replaced the old functions where necessary.
Reworked language_ru.h.

Speeded up test for zero length string in cardreader.cpp

Updated Finnish language file

Merging latest upstream changes

Merging latest upstream changes

Megatronics 3 servo pins

Issue #1504 – K8200 Z_ENABLE_PIN

- K8200 uses a non-standard RAMPS with Z_ENABLE=63 ??
- Assuming from previous input that 3DRAG is the same.

The `float` keyword should not be on these vars because they conceal
the outer vars, preventing them from obtaining known values before
being passed in `set_bed_level_equation_3pts`. Possibly related to
`Z_RAISE_BETWEEN_PROBING` not functioning.

Merging latest upstream changes

Merging latest upstream changes

When probing PCB´s I had the problem that i needed auto-leveling for specific areas (it´s never the same size).
Not much code, but very useful.
Now I use simply G29 L5 R55 F5 B35 P3 to probe a 4x6cm PCB before milling.
I used int for values... might be wrong...
I hope this time I got the right development tree. (tried first with https://github.com/MarlinFirmware/Marlin/pull/1130/commits)

- Auto-detect “switchable” items where possible
- Handle switchable multi-value fields
- Add standard sections to config form
- Add section markers to configurations
- Add value options to configurations
- Remove and re-add fields for loaded configs
- Preserve sections across configs
- Preserve non-added fields
- Style added fields wider & newline by default

Fixed how stepper ISR figure it out when the head (extruder) is going to
Min or Max direction.
Added Homing to Max Endstops.

Latest upstream commits

Compiling errors with 4 Extruders defined and Viki 2 Implementation

Multi-line G-code commands

- Naive implementation, assuming the data sheet pin numbers correspond
to Arduino pin numbers.

- Fetch code now handles github, local, or http: access
- Download button creates a time-stamped inline download
- More complete error messages
- Show warnings when approaching the hourly fetch quota (limit
reloading!)
- Added my test domain (where the _htaccess is deployed)
- `_htaccess` file added to set Access-Control-Allow-Origin “*”
- Marlin logo with css
- Limit selectable areas to avoid annoying selections
- Messages now persist until dismissed
- Default repo for files set to thinkyhead, ‘marlin_configurator’ branch
- Cosmetic changes

Conflicts:
	Marlin/Configuration.h
	Marlin/Marlin_main.cpp

Bedleveling: X and Y must be Integers not Float!

#include "language_en.h" before the national language in language.h

https://github.com/Wurstnase/Marlin/blob/Development/Marlin/Configuration.h#L427

Fix for #1485

Update ultralcd_st7920_u8glib_rrd.h

Fixed delay-times during Init. REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER won't get initialized on some Boards because delay was to short.

Make display language configurable in Configuration.h

- Make api.github the default source for configurations
- Remove configurations from the configurator
- Continuation and enhancements