Added an action to compute the distance only on the y direction.

See merge request !2

# Conflicts:
#   src/iri_bt_basic_nodes.cpp

Revert "Added two actions: one to generate a success state and the other one...

See merge request !1

The Dynamic reconfigure data structrue is passed as a pointer so that changes on its values are detected.

Merge branch 'testing' of ssh://gitlab.iri.upc.edu:2202/labrobotica/ros/iri_core/iri_base_bt_client into testing

Solved a problem when having to modify the values of the dynamic reconfigure data. The base class parameters are known.

Revert "Added two actions: one to generate a success state and the other one to generate a failure state."

This reverts commit 85939afd

Removed the diagnostic_period parameter from the dynamic reconfigure data. The value is set at the constructor.

Added the diagnostic_period parameter to the dynamic reconfigure parameter data (although any changes will be ignored).

Removed the abstract init function. All the initialization should be done in the constructor of the inherited class.

Added the start and stop associated actions and conditions.

Solved a bug with the order in which the attributes of the class were initialized: the wrong order caused a segmentation fault.
Catched the BT::RunTime exception while trying to import the tree.
Partially implemented the dynamic reconfigure callback.