Implement endpoint method to get conferences in Amsterdam that are not sold out yet, and moved some code and marked which task they belong to.
Implement endpoint method to get conferences in Amsterdam that are not sold out yet, and moved some code and marked which task they belong to.

swesterveld/udacity-nd004-p4-conference-organization-app,swesterveld/udacity-nd004-p4-conference-organization-app,swesterveld/udacity-nd004-p4-conference-organization-app