added the polyfit method; testing if the extend method really needs homogeneous objects; added trivial call code to the append_epochs method; implemented the repeat, segmentate, component_ampl, component_split_plot and component_split methods
added the polyfit method; testing if the extend method really needs homogeneous objects; added trivial call code to the append_epochs method; implemented the repeat, segmentate, component_ampl, component_split_plot and component_split methods

jgte/orb,jgte/orb,jgte/orb,jgte/orb,jgte/orb