Keep signac shell command history on a per-project basis.

[csadorf]

Resolves issue #134.

[codecov]

Codecov Report

Merging #194 into master will decrease coverage by 1.04%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #194      +/-   ##
==========================================
- Coverage   65.03%   63.99%   -1.05%     
==========================================
  Files          37       37              
  Lines        5546     5555       +9     
==========================================
- Hits         3607     3555      -52     
- Misses       1939     2000      +61

Impacted Files	Coverage Δ
signac/__main__.py	0% <0%> (ø)	⬆️
signac/core/json.py	81.57% <0%> (-13.16%)	⬇️
signac/common/errors.py	72.22% <0%> (-11.12%)	⬇️
signac/contrib/job.py	86.11% <0%> (-4.37%)	⬇️
signac/contrib/project.py	89.13% <0%> (-1.49%)	⬇️
signac/contrib/indexing.py	73.77% <0%> (-1.48%)	⬇️
signac/contrib/collection.py	87.59% <0%> (-1.32%)	⬇️
signac/core/jsondict.py	93.86% <0%> (-1.23%)	⬇️
signac/core/dict_manager.py	88.37% <0%> (-1.17%)	⬇️
signac/contrib/filesystems.py	31.13% <0%> (-0.95%)	⬇️
... and 5 more

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[codecov]

Codecov Report

Merging #194 into master will decrease coverage by 0.12%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master    #194      +/-   ##
=========================================
- Coverage   65.03%   64.9%   -0.13%     
=========================================
  Files          37      37              
  Lines        5546    5557      +11     
=========================================
  Hits         3607    3607              
- Misses       1939    1950      +11

Impacted Files	Coverage Δ
signac/__main__.py	0% <0%> (ø)	⬆️

---

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[csadorf]

Not sure why the coverage decreased. Maybe, because I'm skipping the history code segment on PyPy?

[vyasr]

It looks like the coverage tracking as a whole doesn't recognize that test_shell.py is actually calling the __main__.py functions, the package must not know how to deal with entry points. The entire __main__.py has 0% coverage. I wouldn't worry about it.

[vyasr]

Looks fine to me. As we add more special signac files, we may want to consider putting them into a .signac directory or something, though.