Parse xyz for a species from a file

[alongd]

Currently allowing .xyz and .gjf

[codecov]

Codecov Report

Merging #70 into master will decrease coverage by 3.95%.
The diff coverage is 81.92%.

@@            Coverage Diff             @@
##           master      #70      +/-   ##
==========================================
- Coverage   39.74%   35.79%   -3.96%     
==========================================
  Files          19       19              
  Lines        4380     4422      +42     
  Branches     1144     1158      +14     
==========================================
- Hits         1741     1583     -158     
- Misses       2342     2569     +227     
+ Partials      297      270      -27

Impacted Files	Coverage Δ
arc/job/job.py	22.04% <0%> (-0.19%)	⬇️
arc/species.py	51.87% <100%> (-8.97%)	⬇️
arc/ts/run_autotst.py	34.37% <100%> (ø)	⬆️
arc/plotter.py	18.81% <100%> (-12.19%)	⬇️
arc/scheduler.py	16.18% <40%> (-1.96%)	⬇️
arc/parser.py	81.41% <90.9%> (+13.33%)	⬆️
arc/processor.py	36.91% <0%> (-21.97%)	⬇️
... and 2 more

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[alongd]

Added Molpro and QChem input files, add an output file parser through Arkane