Ignore FileNotFoundError when guessing project name.

[jad-b]

If the host system (or container) is missing programs like 'git' or 'hg', a FileNotFoundError is raised, which crashes the process. This patch adds this error to the list of continuable exceptions.

The tox tests pass against python3.5 & 2.7; waiting on Travis to verify the rest.

  py35: commands succeeded
  py27: commands succeeded
  congratulations :)

[ionelmc]

Thanks, good catch. Perhaps add yourself to AUTHORS.rst?

[jad-b]

Seems small, but happy to be a part.

BTW, very excited to find this package. Always great to have your expectations far exceeded when looking for a solution to your problem.

[ionelmc]

Wouldn't want people thinking contributions aren't valued. Any contributions :)

Also, it turns out FileNotFoundError ain't available on Python 2. Hmmm

[jad-b]

Really...that raises questions about it passing py27 locally.

A quick trial of the same logic in 2.7.12 raises the more generic OSError, which is a parent to FileNotFoundError in python 3. I can update the exception type, at the small cost of catching additional (but unlikely) sibling exceptions.

[codecov-io]

Codecov Report

Merging #76 into master will decrease coverage by 1.53%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #76      +/-   ##
=========================================
- Coverage   77.73%   76.2%   -1.54%     
=========================================
  Files          16      16              
  Lines        1698    1698              
  Branches      303     303              
=========================================
- Hits         1320    1294      -26     
- Misses        316     340      +24     
- Partials       62      64       +2

Impacted Files	Coverage Δ
src/pytest_benchmark/utils.py	76.7% <100%> (-4.71%)	⬇️
src/pytest_benchmark/timers.py	74.19% <0%> (-6.46%)	⬇️
src/pytest_benchmark/logger.py	78.43% <0%> (-3.93%)	⬇️
src/pytest_benchmark/stats.py	90.54% <0%> (-1.36%)	⬇️

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