Add support for namespaces in jsdoc

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Add placeholders for translation functions

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Port option form field to new API

"name:target" -> "name", "target"

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Add info about translation comments

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Add info how test translations

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>