added accessor function start_picture to determine if the point set by ->_set_region_for_point starts at the left, right or center of the chromosomal view
added accessor function start_picture to determine if the point set by ->_set_region_for_point starts at the left, right or center of the chromosomal view

asherkhb/coge,LyonsLab/coge,asherkhb/coge,LyonsLab/coge,LyonsLab/coge,asherkhb/coge,asherkhb/coge,LyonsLab/coge,LyonsLab/coge,asherkhb/coge,LyonsLab/coge,LyonsLab/coge,asherkhb/coge,asherkhb/coge,asherkhb/coge,asherkhb/coge,LyonsLab/coge,LyonsLab/coge