Remove unneeded constructor declaration

Change-Id: Id7be078bdd96891adefe62b9666d8b66dd318903
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Add type_conversion.h to HEADERS so that is shows up in QtCreator

Change-Id: I6b018092c8b74fa50bd0a2b42a2014ac4897526f
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>