BUG: polyMesh constructor AUTO_WRITE flag, ignored readOpt (#1147)
- fixed some more places with an explicit AUTO_WRITE. BUG: revert handling of the readOption. It should not be NO_READ. In cases where the user a IOobject without specifying read/write, it defaults to NO_READ anyhow. However, the move constructor can also be called with empty lists and a read option. This has the same signature, but obviously will not work with NO_READ.