prepared v1.3.5

preparing 1.3.4

updated line flow to include header and cmake cmake happy

added routines for getting fixed/switched shunt from name/bus number

release count 2

added unittests for dcpf sensitivities, also added sens_i_mag_u_bound…

… for branches, (not used yet)

fixed python,matlab URL in docs

preparing 1.3.0 release

found bug with config.h install. Changed config.h to pfnet_config.h a…

…nd added nobase nodist option to install it but not put in in dist

udpated setup version and changelog