v2.1.0_asynchronous_wallets

Some wallet listings are now much faster, depending on the action and required details.

Other improvements:

• Addresses are now listed next to wallet names for improved visibility
• Wallets with no balances now list correctly
• Gas listing failures now carry on instead of exiting
• Validator code tidied up
• Balance pagination now actually works
• On-chain send transaction summaries now work
• Osmosis database now checks for recent updates

Specifically tested to work with v2.1.3 of Terra Classic SDK

What's Changed

• 2.1.0 asynchronous wallets by @geoffmunn in #17

Full Changelog: v2.0.0_Refactored_codebase...v2.1.0_asynchronous_wallets