WIP: Initial testing with one session/subject
WIP: Run one session/subject successfully
ENH: Refactored workflow with new config variable and singleSession.py executable
STYLE: Updated configuration template file
Merge pull request #129 from BRAINSia/SGEGraphTest

ENH: single-session workflows

New config variable WORKFLOW_TYPE

atlas-based-reference (previously 'baseline') OR
subject-template-generation (previously 'template') OR
subject-based-reference (previously 'longitudinal')
Valid WORKFLOW_COMPONENTS (for *-based-reference ONLY):

'tissue_classify'
'auxlmk'
'segmentation'