Merge pull request hyperledger#45 from andrewwhitehead/fix/txn-rollback

Add DbSessionTxn separate from DbSessionActive

Merge pull request hyperledger#43 from andrewwhitehead/fix/conc-upd

Reliability improvements

Merge pull request hyperledger#36 from andrewwhitehead/0.2.4-updates

Accept EC key type for BLS keys

Merge pull request hyperledger#35 from andrewwhitehead/update-deps

Update dependencies

Merge pull request hyperledger#20 from andrewwhitehead/fix/enc-profil…

…e-key

Merge pull request hyperledger#15 from andrewwhitehead/021-deps

Update p256, k256, sqlx dependencies; update version to 0.2.1

Merge pull request hyperledger#13 from andrewwhitehead/more-keys

0.2.0-pre.6 updates

Merge pull request hyperledger#12 from andrewwhitehead/more-keys

0.2.0-pre.5 updates

Merge pull request hyperledger#11 from andrewwhitehead/more-keys

0.2.0-pre.4 updates

Merge pull request hyperledger#9 from andrewwhitehead/more-keys

0.2-pre.3 updates