Rename 'by' to 'issuer' in ban model

Signed-off-by: Ian Macalinao <ianmacalinao@gmail.com>
Change API routes

Signed-off-by: Ian Macalinao <ianmacalinao@gmail.com>
Update seeds.coffee for issuer field

Signed-off-by: Ian Macalinao <ianmacalinao@gmail.com>
Update query.coffee for new routes

Signed-off-by: Ian Macalinao <ianmacalinao@gmail.com>
Add default JSON page for unmatched requests

Signed-off-by: Ian Macalinao <ianmacalinao@gmail.com>