New GPAW: Replace GPAW examples with the new syntax
When the new GPAW version is released, the user interface will change somewhat. For example, `LCAOTDDFT` will be replaced by `RTTDDFT`. At this time, the `RTTDDFT` interface is not yet feature complete with the old. For example, one cannot apply arbitrary laser pulses yet (such as the sinc-pulse used in the rhodent examples). When the interface is ready, one should update the getting_started/preparation page in rhodent to reflect the new interface (possibly keeping around the examples with the old interface?). All other rhodent examples would be unchanged but the new interface.
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