Doc comments

[keppel]

Adds doc comments throughout the code.

[codecov]

Codecov Report

Attention: Patch coverage is 36.00000% with 32 lines in your changes missing coverage. Please review.

Project coverage is 57.14%. Comparing base (5869975) to head (b18961f).
Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/abci/node.rs	0.00%	12 Missing ⚠️
src/ibc/service.rs	0.00%	7 Missing ⚠️
src/abci/prost.rs	0.00%	2 Missing ⚠️
src/ibc/query.rs	0.00%	2 Missing ⚠️
src/merk/store.rs	0.00%	2 Missing ⚠️
src/plugins/signer.rs	88.23%	2 Missing ⚠️
src/tendermint/mod.rs	0.00%	2 Missing ⚠️
src/abci/mod.rs	0.00%	1 Missing ⚠️
src/ibc/impls.rs	0.00%	1 Missing ⚠️
src/plugins/abci.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #264      +/-   ##
===========================================
+ Coverage    57.07%   57.14%   +0.06%     
===========================================
  Files           84       83       -1     
  Lines        15894    15880      -14     
===========================================
+ Hits          9072     9074       +2     
+ Misses        6822     6806      -16     

Files with missing lines	Coverage Δ
src/call.rs	43.88% <ø> (ø)
src/client/exec.rs	94.75% <ø> (ø)
src/client/mock.rs	97.01% <ø> (ø)
src/client/mod.rs	82.23% <ø> (ø)
src/client/trace.rs	100.00% <ø> (ø)
src/client/wallet.rs	40.69% <ø> (ø)
src/coins/accounts.rs	0.00% <ø> (ø)
src/coins/amount.rs	62.50% <ø> (ø)
src/coins/coin.rs	31.37% <ø> (+2.28%)	⬆️
src/coins/decimal.rs	72.85% <ø> (ø)
... and 63 more