add note about creating validate file

git-svn-id: svn://svn.code.sf.net/p/fuego/code/trunk@1892 2e953b5c-c64d-0410-be54-f773e93e544c
Use features prior knowledge by default; reduce weight of default prior to 0.15

git-svn-id: svn://svn.code.sf.net/p/fuego/code/trunk@1893 2e953b5c-c64d-0410-be54-f773e93e544c
Use a single scaling parameter GoUctGlobalSearchStateParam::m_additiveKnowledgeScale instead of per-predictor scaling; set the parameter via GTP/UI

git-svn-id: svn://svn.code.sf.net/p/fuego/code/trunk@1894 2e953b5c-c64d-0410-be54-f773e93e544c