fix: spm realign input options
fix: handle potential unicode error with spm output
fix+api: spm with matlab common runtime, realign prefix and new input to control whether spm generates spm5 or spm8/12 job files
enh: update to show how the matlab common runtime version of spm can be used with nipype
fix: updated tests to reflect new inputs
doc: added page on using the spm mcr