Rename get_database_sizes -> disk_usage and add more folders
Remove seemingly unecessary and not-up-to-date calls to
FC_REGISTER_EXCEPTIONS
Tweak transaction expiration check
Pretty-print disk_usage
Don't fail on reading bad wallet properties
Delete ancient programs folders
Move some methods from wallet to wallet_impl
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop

Conflicts:
	libraries/cli/pretty.cpp
	programs/web_wallet
Remove confusing pretty-print
Comment out unused variable
Add total data directory size to disk_usage
Clean up market_status
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
Add blockchain_list_markets
Update fc submodule