Added a module for converting to/from dicts

[jesper-friis]

Description:

Added a module for converting to/from dicts

Type of change:

• Bug fix.
• New feature.
• Documentation update.
• Testing.

Checklist for the reviewer:

This checklist should be used as a help for the reviewer.

• Is the change limited to one issue?
• Does this PR close the issue?
• Is the code easy to read and understand?
• Do all new feature have an accompanying new test?
• Has the documentation been updated as necessary?

[Treesarj]

Looks good but build is failing(pls fix)

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +1.32% 🎉

Comparison is base (a71409f) 74.78% compared to head (a56709a) 76.11%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
+ Coverage   74.78%   76.11%   +1.32%     
==========================================
  Files          15       17       +2     
  Lines        1285     1348      +63     
==========================================
+ Hits          961     1026      +65     
+ Misses        324      322       -2     

Files Changed	Coverage Δ
tripper/__init__.py	100.00% <ø> (ø)
tripper/mappings/mappings.py	67.39% <ø> (ø)
tripper/triplestore.py	82.51% <ø> (+0.61%)	⬆️
tripper/tripper.py	88.13% <ø> (-0.20%)	⬇️
tripper/convert/__init__.py	100.00% <100.00%> (ø)
tripper/convert/convert.py	100.00% <100.00%> (ø)

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[CasperWA]

this might fix the docs build issue?