Improve print_message(), add print_success().


git-svn-id: http://observium.org/svn/observer/trunk@4187 61d68cd4-352d-0410-923a-c4978735b2b8
Check RRD dir for add/rename/delete hosts. Fix [OBSERVIUM-367].


git-svn-id: http://observium.org/svn/observer/trunk@4188 61d68cd4-352d-0410-923a-c4978735b2b8
Check RRD dir for rename host [OBSERVIUM-367].


git-svn-id: http://observium.org/svn/observer/trunk@4189 61d68cd4-352d-0410-923a-c4978735b2b8