1.0.0-rc7

• [ENH] Update pinned version of nipype to latest master
• [ENH] Added rX permissions to make life easier on Singularity users (#757)
• [DOC] Citation boilerplate (#779)
• [FIX] Patch to remove long filenames after mri_concatenate_lta (#778)
• [FIX] Only use unbiased template with --longitudinal (#771)
• [FIX] Use t1_2_fsnative registration when sampling to surface (#762)
• [ENH] Remove --skull_strip_ants option (#761)
• [DOC] Add reference to beginners guide (#763)