Facilitate instantiation without YAML

[sonelu]

Changes in the base framework to allow creation of objects programmatically, without the use of YAML.

Also includes explicit instantiation for #69.

Bumped version to 0.2.0

[codecov]

Codecov Report

Merging #87 into master will decrease coverage by 0.04%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master      #87      +/-   ##
==========================================
- Coverage   94.14%   94.10%   -0.04%     
==========================================
  Files          24       24              
  Lines        2353     2355       +2     
  Branches      340      341       +1     
==========================================
+ Hits         2215     2216       +1     
  Misses         91       91              
- Partials       47       48       +1     

Impacted Files	Coverage Δ
roboglia/_version.py	0.00% <0.00%> (ø)
roboglia/base/bus.py	93.39% <85.71%> (-0.83%)	⬇️
roboglia/base/robot.py	93.99% <100.00%> (+0.02%)	⬆️
roboglia/dynamixel/bus.py	97.03% <100.00%> (+0.01%)	⬆️
roboglia/i2c/bus.py	88.51% <100.00%> (ø)

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