Deadlock if invalid format of stop words

[mbyd916]

For stop words, valid format is : one stop word in each line.

Extra spaces followed stop word may cause error, and will be sent to errCh (unbuffered channel). Refers to dictionary.go#L38.
But dictionary.go#L68 still waits for tokenCh, therefore dictionary.go#L70 can not receive from errCh, finally DeadLock occurs.

There is the same problem, if error(dictionary.go#L49 ) occurs.