Added failure in start() for not running process

Added failure in start() for not running process
fix for root master NULL pinter

fix for  root master NULL pinter
Fixed num servers counter

Fixed num servers counter
MAX-94, Added configuration parameter, max_slave_replication_lag=<longest allowed replication lag in seconds> to router section.

Parameter can be changed runtime but it requires reloading of config.
Merge branch 'develop' of https://github.com/skysql/MaxScale into develop
Modified refreshInstance to support max_slave_replication_lag.
set x permission to /etc/init.d/maxscale
Merge pull request #8 from skysql/MAX-94

Max 94
Addition of server weighting to the read/write splitter

Tidy up the output of show server and show servers so that columsn align