introduce DB class, refactor Model to use it
validations for topic
topic belongs to category n user
use user_id in topic seed
add user_id to topics table
fix typo
new n create actions
div stylin
show who's the topic's owner
show topic's owner
sql for replies table
reply model
replies ctrlr
use new replies ctrlr
login menu to layout
reply seeds
mock of replies relation
drop table replies
topic has many replies
styling for login and some fields