Merge branch 'coverage' into 'devel'

include/dynamic-graph/debug.h

include/dynamic-graph/dynamic-graph-api.h

include/dynamic-graph/eigen-io.h

include/dynamic-graph/entity-helper.h

include/dynamic-graph/entity.h

include/dynamic-graph/exception-abstract.h

include/dynamic-graph/exception-factory.h

include/dynamic-graph/exception-signal.h

include/dynamic-graph/exception-traces.h

include/dynamic-graph/factory.h

include/dynamic-graph/fwd.hh

include/dynamic-graph/linear-algebra.h

include/dynamic-graph/logger.h

include/dynamic-graph/null-ptr.hh

include/dynamic-graph/pool.h

include/dynamic-graph/process-list.hh

include/dynamic-graph/real-time-logger.h

include/dynamic-graph/signal-array.h

include/dynamic-graph/signal-base.h

include/dynamic-graph/signal-cast-helper.h