* Replace logging backend to flexi-logger and add log rotation
* Changed flexi_logger to log4rs
* Disable logging level filtering in Root logger
* Support different logging levels for file and stdout
* Don't log messages from modules other than Grin-related
* Fix formatting
* Place backed up compressed log copies into log file directory
* Increase default log file size to 16 MiB
* Add comment to config file on log_max_size option
* change keychain to use bip32 paths
* convert keychain to use bip32
* change identifier to be serialisation of 4-level bip32 path
* wallet changes compiling, pass parent key into all wallet functions
* rustfmt
* fix tests in chain
* rustfmt
* core tests passing
* rustfmt
* pool tests
* rustfmt
* fixing wallet tests
* rustfmt
* remove file wallet
* wallet tests compiling
* rustfmt
* remove db_migrate
* successful tx exchange test using BIP32 paths
* rustfmt
* fix wallet derivation paths to m/0/0/0
* wallet test fixed again, working with default path
* rustfmt
* fix server tests
* rustfmt
* make parent_id a trait on walletbackend
* rustfmt
* add ability for wallet to switch between multiple named accounts, and tests (not complete)
* rustfmt
* account switching tests in place and passing
* rustfmt
* compile and test with latest libsecp changes
* added public key sum to calculated e for aggsig
* rustfmt
* Update secp to 26
* bulletproof bip32 path integration
* rustfmt
* wallet restore updated with bip32 paths, also restores accounts
* rustfmt
* rustfmt
* remove old extkey
* remove old extkey
* rustfmt
* add wallet account commands
* rustfmt
* update wallet documentation
* rustfmt
* merge from master
* update libsecp tag
* merge from upstream and fix server test
* rustfmt
* rustfmt
* merge from master
* update latest libsecp merge
* fix commitment to zero value generation