IOV Weave Files

[Changelog](https://github.com/iov-one/weave/blob/master/CHANGELOG.md#100:

• bnsd: set fee to zero for preregistration.RegisterMsg
• bnsd: add msgfee.UpdateConfigurationMsg support
• bnsd: a data migration for rewriting blockchain ID to CAIP specified format
• a new weave.Fraction type was added to represent fractional values. It should be used instead of floating point type when precision is needed.
• enable all x/account messages to be executed via proposal
• bnsd: allow datamigration messages to be executed by a proposal
• bnsd: a new query endpoint /gconf which allows to fetch any gconf managed configuration entity.
• A new query mod range that allows to query for items between certain rage. Result set size is always limited which makes this query suitable for public API.
• a new application cmd/bnsapi was added.
• Go 1.13 is now supported and tested by CI.
• Tendermint upgraded to 0.31.11.
• bnsd/x/termdeposit a new extension for fix-term deposit of money and investment. Integrated with bnsd. bnscli was updated to support new messages.
• orm: native index supports ABCI queries returning all matching entities without pagination.

Breaking change

• bnsd was updated to burn (remove from the system) any funds send to iov1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqvnwh0u address.
• minimal Go version is now 1.12.14.
• bnsd/x/account: a new admin index in Domain bucket
• bnsd/x/account: a new owner index in Account bucket