fix: qstat initialization
Merge pull request #921 from satra/fix/sge

fix: qstat initialization
[FSL] Updated BEDPOSTX and XFibres

Old interfaces are still available as OldBEDPOSTX and OldXFibres
fixed gradient nonlinearities implementation
fixed errors
fixed bug
fixed XFibres
fix doctest of BEDPOSTX
tested new XFibres. new parallel workflow
preparing new workflow for parallel processing
new split and merge interfaces
added test and some missing files in last commit
new parallel bedpostx finished :)
Merge branch 'enh/UpdateBEDPOSTX' into experimental

Conflicts:
	CHANGES
	nipype/algorithms/misc.py