New OpenRISC landing page

For newcomers, but also for active members in the community, it was quite hard lately to find information around the internet. The opencores website and wiki look less and less appealing and need some serious work to provide the updated information. Other information, such as the Linux port or new toolchains are either hard to find or split among several places.

Everybody knows about the situation and we have discussed to get a least a simple landing page up and running again, so that both new users but also active members of the community find there basic entry point. It is of course not the full information and probably never will be due to the vivid and wide-spread nature of the OpenRISC community. But it should at least be a rewrite of the 0x100 vector (the reset entry point the processor starts executing from).