Updates to work with python3.

Fixes file peeker crash with gcc7.



Former-commit-id: 1f682835d8ac5d81a51fcc9093d3578cb68a45f5

Former-commit-id: a9bbe92a

2016-04-27 Walter Lampl <walter.lampl@ cern.ch>
	* rewrite of get-tag-diff.py to be cmt and cmake compatible
	* tag PyUtils-00-14-75

2016-04-12  scott snyder  <snyder@bnl.gov>

	* Tagging PyUtils-00-14-74.
	* python/RootUtils.py: Remove diagnostics.  Keep temp files open
	through the end of program execution to avoid cling caching
	issues.

2016-04-11  scott snyder  <snyder@bnl.gov>

	* Tagging PyUtils-00-14-73.
	* Still working on ATN test failure.  Seems to be related to
	ROOT-7059.

2016-04-11 Will Buttinger <will@cern.ch>
	* bin/getAMIDatasetParameters.py: improved default printout, preserve order of specified datasets, and preserve comments/blanklines from file in the inDsTxt
	* Tagging PyUtils-00-14-72
...
(Long ChangeLog diff - truncated)

	* merged diff between PyUtils-00-14-37 PyUtils-00-14-38:
	* python\PoolFile.py (extract_streams_from_tag): workaround for
	PyROOT getattr(tree, branchname) bug in ROOT 5.34.25 for reading
	Tokens from TAG files (https://its.cern.ch/jira/browse/ATLASRECTS-1489)
	* Tagging PyUtils-00-14-34-01

2015-06-04  Marcin Nowak  <Marcin.Nowak@cern.ch>
	* bin\getTagDiff.py: improved handling of LCG and MIG tags
	* Tagging PyUtils-00-14-34

2015-06-01  Marcin Nowak  <Marcin.Nowak@cern.ch>
	* python\scripts\diff_root_files.py: fix --ignore-leaves which
	broke in the last tag
	* Tagging PyUtils-00-14-32
	* make --ignore-leaves able to ignore subbranches
	* Tagging PyUtils-00-14-33

2015-05-28  Marcin Nowak  <Marcin.Nowak@cern.ch>
	* python\scripts\diff_root_files.py: rewrote the code to
	handle differencies better
...
(Long ChangeLog diff - truncated)