to make the overall rectangle API more uniform.

a user to read the state of these objects.

objects.

outputs sometimes.

reasonable.

format for sequence_segmenter objects.

and cross_validate_sequence_segmenter()

used by the svm_c_linear_trainer so that the epsilon value is not implicitly
scaled by the C values given by the user.  This should make this object
slightly easier to use.

to avoid a run time error in gcc 4.7.