invalidate bug fixed; Model uncomplete;
post add column status; model and dao unchanged, do it tomorrow
why do not github count my push ???
add role; needs triggers;needs daoa;needs dao-tests
manually merged some Models; junit test is set up
fix bugs of String para concatenating to SQL statment; triggers added, but needs test
tag post trigger tested and passed; user trigger untested
dao about post finished, unit tests needed!
add views for all table; getSession replaced by getHIbernateTemplate;
ignore binary files
merge to master