fixed stupidest bug ever: out message was created as in message
delete method added to KonMessage class
make coder errors not null in db
fixed saving messages with regards to not null db constraints
improved delete method in Database class
message to send must be an OutMessage
improved delete method in KonMessage class
make KonThread deletable
new created message is an out message
added delete method to thread list
send out message in Kontalk class
renamed list item in UserListView class
added implementation for deleting thread in view
update thread view after thread was deleted