Migrate wrappers into their own separate folder structure.

[aentinger]

This fixes #72 .

[codecov-io]

Codecov Report

Merging #78 (268fdf4) into master (84ef42f) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #78   +/-   ##
=======================================
  Coverage   85.64%   85.64%           
=======================================
  Files          17       17           
  Lines         641      641           
=======================================
  Hits          549      549           
  Misses         92       92           

Impacted Files	Coverage Δ
src/wrappers/uavcan/node/ExecuteCommand_1_0.hpp	100.00% <ø> (ø)
src/wrappers/uavcan/node/Heartbeat_1_0.hpp	100.00% <ø> (ø)
src/wrappers/uavcan/node/Version_1_0.hpp	100.00% <ø> (ø)
src/wrappers/uavcan/node/ID_1_0.hpp	100.00% <100.00%> (ø)
src/types/uavcan/node/ID_1_0.hpp

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