make it compile with none gcc compilers

Change-Id: Ib8a49014ecb86db79517d34338b0b9db43bef1fd
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Gerrit: Read out dependency information.

Pass on the command line argument --dependencies to the client,
read out dependent/needed by changes and display them in the
detailed text view. Move the toHtml() method from GerritChange to
GerritModel to be able to display titles of dependent changes.

Change-Id: I1d0b67a995d45a9fe5b7bdb3ff51cc905d58478f
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>