Various documentation improvements, with particular emphasis on the importance of setting appropriate service commands instead of relying on pg_ctl.

Poll demoted primary after restart as a standby during a switchover operation (GitHub #408).

Add configuration parameter config_directory (GitHub #424).

Add sanity check if --upstream-node-id not supplied when executing repmgr standby register (GitHub #395).

Enable pg_rewind to be used with PostgreSQL 9.3/9.4 (GitHub #413).

When generating replication connection strings, set dbname=replication if appropriate (GitHub #421).

Enable provision of archive_cleanup_command in recovery.conf (GitHub #416).

Actively check for node to rejoin cluster (GitHub #415).

repmgrd: set connect_timeout=2 (if not explicitly set) when pinging a server.

Fix display of conninfo parsing error messages.

Fix minimum accepted value for degraded_monitoring_timeout (GitHub #411).

Fix superuser password handling (GitHub #400)

Fix parsing of archive_ready_critical configuration file parameter (GitHub #426).

Fix repmgr cluster crosscheck output (GitHub #389)

Fix memory leaks in witness code (GitHub #402).

repmgrd: handle pg_ctl promote timeout (GitHub #425).

repmgrd: handle failover situation with only two nodes in the primary location, and at least one node in another location (GitHub #407).

repmgrd: prevent standby connection handle from going stale.