[ordering]
factor out that part of LeafGridView ordering which is independent from a gridview,
this is the first step for other functionspaces in the future, e.g. tracespaces
[gridglueremotelfs]
cleanup

- we don't need to wrap the compiste and power lfses
- we don't support (anymore) remotelfs<gridgluegfs>
[test]
disable some tests to get gridgluegridfunctionspace working again...
[ordering]
add new remoteordering
[gridglueremotelocalfunctionspace]
add conversion from RemoteGFS to RemoteLFS
[gridglue]
larger changes to remotefunctionspace, remotelfs, gridgluefunctionspace and gridgluelfs