Actuino split in 2 versions

The early work on the PCB design uncovered a few issues with the initial goal. In particular, the SSRAM puts too much pressure on the PCB and routing so it is not possible to make a cheap 2-layers circuit. The free version of Eagle reaches the limits so it is not a viable solution, at least for the entry level. So I have decided to make 2 versions :

* The SSRAM-based board will be kept as a higher-performance option, with a slightly more expensive 4-layer PCB and the design is not available as Eagle files. Let's call it "version S"

* "Version A" uses Asynchronous SRAM, with a less demanding pinout. There are less power pins and less pressure on the routing, which should help keep the promises of Eagle design files and cheaper PCB. Memory capacity could be smaller too, there is more choice of parts. ASRAM is also somewhat slower but consumes less than SSRAM.

Both versions would be available in 3 ways : built and tested, or as a kit (build and test it yourself from the supplied parts), and if you feel adventurous, get the files and make everything yourself.