Merge branch 'developer' of https://github.com/Oroles/MazeSolver into mapping
Take in consideration unvisited cell

Now when all the neigbours are visited, it checks for the closest unvisited cell, and will return the direction of the next cell, to reach the unvisited cell.
Modify the alg to find next cell

now I also cover the case in which there is no unvisite cell, this case should never happen but anyway
Resolve bug

In case that in the negative x or y was a free cell it didn't worked, now is working.
Calibration of wheels and wheelbase

It works !!!!
Fix the move_forward for negative values
Merge branch 'developer' of https://github.com/Oroles/MazeSolver into developer
Mapping : replace event catch by a condition and add limit of the map

Several changes here :
* the MappingStart event is replaced by a condition and works as follow
-> if we enter in a new cell, we are not ready to measure something
(ready=FALSE)
-> at each call of Mapping, we check if it's ready ; if not we first
check if now we are in the right square and update the value of ready if
needed, and then we return.

* We now know exactly if a cell is outside the map, so we can detect a
problem, and more important never overwrite other values. Furthermore
the MainController can see if he can't decide to go in a cell, because
it's out of the map. Normally, with a closed labyrinth, it's not a
problem.

* Thanks to the previous changement with which the the min and max
values for both x and y are stored, it's possible to display the map in
the right order, i.e. display the south eastern cell in the corner of
the screen.

* Last minor fix, int becomes U8 for some functions
Main step doesn't choose to go to "out of the map" cells
Localization sent the CellCenter event only once by cell

(+ a minor fix in init_localization)
This changes also the MainController behaviour at initialization. The
localization begins also later, for the mapping to have the time to
initialize values for the first cells. When localization starts, it
sends the CellCenter event to the MainController to wake it up, the
MainController initialize the localization and if the robot is already
in the center, decides what to do next. Otherwise enter in the main loop
and wait for the next CellCenter event.
Turn off the display
Enable the color reader
Merge remote-tracking branch 'origin/crash_fix' into developer

Conflicts:
	main_controller.c
	slam/mapping.c
Simpify speed limit of turn movement
Resolve bug in node

There was a bug in the remove node, when the deleted node is last in the list. Now the problem is solve
Remove the MovementOrder ressource

It represented a risk of deadlock
Change the display_PID
Change precision of cardinal point
Resolve bug

The data between cells was not correctly updated, also the function direction_of_next_cell is moved in localization.h
Merge branch 'developer' of https://github.com/Oroles/MazeSolver into developer