- Setting boundaries based on configured limits, contrasting with G28
(which forgets these limits?)

Cleanup rotary encoder encrot* defines

- Adapted “Enhanced G29” code referred to in #1499 and posted at
[3dprintboard.com](http://3dprintboard.com/showthread.php?3105-Auto_Bed_
Leveling-Enhanced-G29-command)
- Compatible with current G29 while adding some new arguments
  - `V` sets the verbose level for serial out
  - `T` (or `V` > 2) send a Topology report to serial out
  - `E` works the same way as before
  - `P` works as before (source used `n` or `U`/`u`)
  - `L`, `R`, `B`, `F` work as before
- Still needs sanity checking for `LRBF`

The X_Axis could not home to min while Y_Max endstop was trigged.

Cleanup of cardreader.*

- Apply standards to cardreader.*
- Fix minor issues with cardreader.cpp
- Apply standards to some other stale regions

The encrot values are used in only one place, and don’t vary, so remove
redundant references.

Cleanup of temperature code

Fix undefined *_PROBE_BED_POSITION error

Panel One encoder pins

- Both TMC, L6470 and pin-driven drivers work.
- All can be mixed and matched as needed.

Merge upstream changes

Added support for PanelOne from T3P3.

Extend the idea of dummy temperature sensors.

Support for simple customisable AutoZProbing area

- Reduce calls to millis()
- General cleanup of manage_heaters
- General cleanup of pid autotune
- Formatting here & there
- Macros to clean up and shrink ISR code (reduced by ~364 lines)

Added a second sensor and made them configurable.

Cleanup and fix ultralcd.cpp

Latest upstream changes

Corrected a typo in ArduinoAddons/Arduino_1.5.x/(...)/boards.txt