replaced several calls to L::Local::find_home() with call to config instance; removed call to L::Local::Debug from lims_config.pl, as debug() uses config instance, which uses lims_config.pl; model classes get config from config instance instead of constructor passing it in LIMS::model(); general tidy-up}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1066 4177bd82-f056-0410-812d-caef170e3fa0