This PR fixes issue #74: language incompatibility in DQ_KinematicController not resetting the stable region flag

[ffasilva]

Main instructions

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Description of changes

I have modified the reset_stability_counter() method to ensure compatibility with its C++ version. Namely, the flag system_reached_stable_region_ is now reset to false.

Rationale

This pull request fixes issue #74.

[bvadorno]

Please change my email to [email protected].

[ffasilva]

Emails updated in 43bf811.