BF: skip first progress update from annex since might be "too stale"

[yarikoptic]

hopefully with future version we could avoid it

Also

• now it wraps update of tqdm in try/except just to avoid sporadic crash due to oh so important tqdm raising an exception ;)
• fixed up some PY3 issues with decoding/encoding json output from annex on python3.5 (as discovered while testing nipype workshop docker image with 0.5.0 under python3). That lead to absent actual progress in the progressbars under python3
• fixed use of re.split so it doesn't issue a warning (Closes fixup to avoid warning on python3 #1433)

Closes #1222

[codecov-io]

Codecov Report

Merging #1434 into master will decrease coverage by 55.65%.
The diff coverage is 6.25%.

@@             Coverage Diff             @@
##           master    #1434       +/-   ##
===========================================
- Coverage   89.44%   33.78%   -55.66%     
===========================================
  Files         236      236               
  Lines       24851    24860        +9     
===========================================
- Hits        22227     8400    -13827     
- Misses       2624    16460    +13836

Impacted Files	Coverage Δ
datalad/ui/progressbars.py	52.38% <0%> (-38.98%)	⬇️
datalad/support/annexrepo.py	57.83% <0%> (-32.87%)	⬇️
datalad/cmd.py	86.76% <100%> (-6.87%)	⬇️
datalad/crawler/pipelines/tests/test_crcns.py	0% <0%> (-100%)	⬇️
datalad/export/tests/test_tarball.py	0% <0%> (-100%)	⬇️
datalad/crawler/dbs/tests/test_files.py	0% <0%> (-100%)	⬇️
datalad/metadata/parsers/tests/test_aggregate.py	0% <0%> (-100%)	⬇️
datalad/distribution/tests/test_create.py	0% <0%> (-100%)	⬇️
datalad/cmdline/tests/test_helpers.py	0% <0%> (-100%)	⬇️
datalad/metadata/parsers/tests/test_bids.py	0% <0%> (-100%)	⬇️
... and 182 more

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