adding trim interface that keeps the original dtype storage
Merge branch 'master' into nipy/trim

* master: (264 commits)
  fixed paths
  Back to dev
  0.7 release
  Code cleanup.
  doc: updated inputs help to indicate FSL and AFNI inaccuracy when using bounds_by_brainmask
  Fix #493
  Fixes #459
  fixed doctests
  changelog
  fix: ants workflows setup
  BF: Fixed several issues with GroupAndStack interface
  DOC: Various clean up an improvements to docstrings.
  DOC: Added example to LookupMeta docstring
  ENH: Allow meta_keys input to LookupMeta be a mapping.
  minor fixes
  deprecated version should be a string, added AFNITraitedSpec for backward compatibility
  docs
  PEP8
  name_source can be a list, make "infolder" a deprecated name
  Removed unnecessary outputsspecs
  ...
Merge branch 'master' into nipy/trim

* master:
  DOC: Update info on Condor and its plugins.
  DOC: Fix documentation glitch
  BF: Use unique filenames for DAGMan workflows
  enh: remove logger dump added in 9d6b1a86921982b84f17b75ebf1a515f1d8710f7
  fix in NewSegment warp field output options
add doc
PEP8