User Documentation, New Cli-command (EPJ-76)

[bytinbit]

Please look at docs/usage.rst, syncing.py and cli.py where I've added the code. The rest of the files have been added as "new" out of unknown reasons.

The cli-command returns the location of the config file and the file path, since this differs from OS to OS. However, I had to add a helper method to show the path to the FileCache - please check if that's ok.

[codecov[bot]]

Codecov Report

Merging #31 into master will increase coverage by 0.06%. The diff coverage is 71.42%.

@@            Coverage Diff             @@
##           master      #31      +/-   ##
==========================================
+ Coverage   89.48%   89.55%   +0.06%     
==========================================
  Files          30       30              
  Lines        1313     1350      +37     
  Branches       86       86              
==========================================
+ Hits         1175     1209      +34     
- Misses        124      128       +4     
+ Partials       14       13       -1

Impacted Files	Coverage Δ
src/kitovu/sync/syncing.py	84.78% <100%> (+0.33%)	:arrow_up:
src/kitovu/cli.py	71.21% <50%> (-1.37%)	:arrow_down:
src/kitovu/gui/confscreen.py	92.1% <0%> (-7.9%)	:arrow_down:
tests/test_filecache.py	100% <0%> (ø)	:arrow_up:
src/kitovu/sync/plugin/moodle.py	33.66% <0%> (ø)	:arrow_up:
tests/gui/test_confscreen.py	100% <0%> (ø)	:arrow_up:
src/kitovu/sync/filecache.py	93.5% <0%> (+2.59%)	:arrow_up:

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