Keyword argument to .splitlines() not supported in py 2.7

[wtriplett]

nipype/nipype/pipeline/plugins/tools.py

Lines 32 to 45 in 388f140

	When creating this crashfile, the results file corresponding
	to the node could not be found.""".splitlines(
	keepends=True
	)
	except Exception as exc:
	traceback += """
	During the creation of this crashfile triggered by the above exception,
	another exception occurred:\n\n{}.""".format(
	exc
	).splitlines(
	keepends=True
	)
	else:

Removing the explicit keyword reference should produce the expected behavior on both py2 and 3.

[satra]

@wtriplett - if you are looking at current master, all development in master is continuing only using python 3 as of the last release. any changes in relation to support python 2 should be made to the 1.3.x release branch (the last release that is py2 compatible).

@effigies - we should update the README to reflect this clearly, and may be even our "latest" docs.

[wtriplett]

@satra: Got it, sorry about that. I will rework the PR.