Cosmos stargate tracking branch

[alpe]

Known problems:

• wasmcli tx send fails with github.com/cosmos/cosmos-sdk/client.GetFromFields nil issue

TODO

• wasmd start command fails with an decoding issue when parsing genesis watch sdk#6837
• check/fix tx send

May add

• LCD and CLI tests

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #172 into master will decrease coverage by 47.98%.
The diff coverage is 62.76%.

@@             Coverage Diff             @@
##           master     #172       +/-   ##
===========================================
- Coverage   67.90%   19.91%   -47.99%     
===========================================
  Files          23       25        +2     
  Lines        2053     6428     +4375     
===========================================
- Hits         1394     1280      -114     
- Misses        563     5079     +4516     
+ Partials       96       69       -27     

Impacted Files	Coverage Δ
app/genesis.go	0.00% <0.00%> (ø)
x/wasm/internal/types/msg.go	40.77% <ø> (ø)
x/wasm/internal/types/query.pb.go	0.72% <ø> (ø)
x/wasm/internal/types/types.go	31.81% <0.00%> (-0.59%)	⬇️
x/wasm/internal/types/types.pb.go	0.55% <ø> (ø)
x/wasm/internal/keeper/querier.go	24.00% <13.17%> (-12.14%)	⬇️
x/wasm/module.go	17.02% <18.18%> (-0.76%)	⬇️
app/export.go	7.59% <21.42%> (+0.27%)	⬆️
x/wasm/internal/types/codec.go	52.38% <23.07%> (-47.62%)	⬇️
x/wasm/internal/keeper/query_plugins.go	57.71% <66.66%> (ø)
... and 10 more

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[alpe]

Closing this in favour of #252