Fixed a few minor issues and updated database schema to v1.3-pre5.  See detailed notes for the list of changes.

* Added extended communities, isPeerVPN, isPeerIPv4 to both v_routes and v_routes_history
* Fixed issue where extended communities were not being updated in the DB on change
* Fixed issues with router disconnects not being recorded correctly in DB
* Changed term reason and code to be empty when router is connected
* Fixed issue where openbmpd would core if the log file couldn't be accessed for read/write
* Fixed peer_rd parsing to correctly parse VPN peer RD types
* Updated database indexes and partitioning for faster queries.