Version 1.4.0 - 26 Jan 2015
* Incremental base backup implementation through the reuse_backup
global/server option. Possible values are off (disabled,
default), copy (preventing unmodified files from being
transferred) and link (allowing for deduplication through hard
links).
* Store and show deduplication effects when using reuse_backup=
link.
* Added transparent support of pg_stat_archiver (PostgreSQL 9.4) in
check, show-server and status commands.
* Improved administration by invoking WAL maintenance at the end of
a successful backup.
* Changed the way unused WAL files are trashed, by differentiating
between concurrent and exclusive backup cases.
* Improved performance of WAL statistics calculation.
* Treat a missing pg_ident.conf as a WARNING rather than an error.
* Refactored output layer by removing remaining yield calls.
* Check that rsync is in the system path.
* Include history files in WAL management.
* Improved robustness through more unit tests.
* Fixed bug #55: Ignore fsync EINVAL errors on directories.
* Fixed bug #58: retention policies delete.
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