Updates README file
Adds first versions

dump_routines: create a mysqldump of the routines only, without the
definer string
dump_tables: create a mysqldump of only the tables (no views)
dump_views: create a mysqldump of the view only, without the definer
string
read_tables: backup some tables you want to keep, read a previously
created dump file and restore the tables you want to keep.