BF: dirDialog has no title field
BF : revert back to multiDIR
BF: comma
BF: MultiDirDialog has bug with Home directory, fixed in code
BF: guis use MyDirsDialog from wx.lib.agw, fix bad Home Directory issue in implementation
BF: bad ()
NF: flag to pet_realignQA to specify optional number of expected frames
BF: bad semi-colon, bad semi-colon
BF: str to int in num_frames
RF: add interp flag to reslice
NF: inv warp deofmation in spm_tools
BF: fix refnorm
NF: EM segmentation
NF: em seg returns file
NF: petonly_em_refnorm added