When flushing the cached_level_map to the underlying level_map, write data in an leveldb::WriteBatch (hoping for improved performance)
Use const references rather than making copies when flushing
cached_level_map
Fix Mac build
Add more debug logging of pending transactions to help debug why transactions are getting 'stuck'
Added compute_item_hashes utility
Add missing file (oops)
Fix clang build
Prepare for upcoming downstream prefix rename
Update submodules
Resolve #876

Not 100% sure what the problem here was... >= for asset ID mismatch is
defined to be false, but for some reason it was returning true. Anyways,
the logic is more explicit now. One can now cancel a bid in a user-
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
Merge branch 'develop' into vote
Add missing header

Missing header fc/reflect/variant.hpp was breaking the build.