Fix kread bundle publishing

[Pandelissym]

Description

This PR fixes the issue with publishing the kread bundles. To fix it agoric published has been replaced by the installBundles script in the agoric/contract/scripts/ folder. The script connects to the chain using Cosmos StargateClient library and sends a transaction to the correct endpoint with the bundle as payload. This is along the lines of what happens under the hood of agoric publish as well but for some reason that seems to be broken currently.

For funding the gas fees of the transaction, the same account is used that funds the transactions to publish the committee bundles and sends proposals for the kread-committee and kread.

Also, in this PR:

• Added some extra steps to make kread-committee (and no-build version) that fetches the address that is to be funded from the AGORIC_SDK_PATH/packages/cosmic-swingset/t1/8000/ folder and funds it. This way we no longer need to run kread-committee, copy the logged address and fund it.
• Reverted back to the old folder structure where the contract code lives in src instead of the versioned folder structere.

Related Issues

Fixes #111

Checklist

Make sure all items are checked before submitting the pull request. Remove any items that are not applicable.

• I have used agoric's linter on my code (What linting configuration should I use for my Agoric contracts? Agoric/agoric-sdk#8274)
• I have updated the documentation to reflect the changes (if applicable).
• I have added/updated unit tests to cover the changes.
• All existing tests pass.