Add a fancy README.

(ok not so fancy, but there are images!)

README.md

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+NewOswan *(name likely to change)*
+==================================
+
+### What is this project?
+NewOswan is a WonderSwan emulator originally based on oswan-unix and heavily modified to be more accurate and better 
+hardware support. 
+
+### I don't care about the blabla, just show me the thing running
+
+Ok ok, here are some screenshots:
+
+Using a Swan Crystal boot rom:
+![Console configuration menu](./doc/configmenu.png)
+
+Wonderswan Crystal boot splash:
+![SwanCrystal boot splash](./doc/bootsplash.png)
+
+Clock Tower:
+![Boot screen of ClockTower](./doc/clocktower.png)
+
+Star Hearts:
+![Boot screen of Star Hearts](./doc/starhearts1.png)
+![Ingame screen of Star Hearts](./doc/starhearts2.png)
+
+### What's different from oswan-unix?
+
+A couple of things:
+
+- NewOswan do properly support the internal EEPROM and cartridge EEPROM. 
+  The original version was based in improper and innacurate hardware documentation and was accessing and storing the
+  information in an incorrect way.
+- NewOswan support the internal bootrom of all the three model of the WonderSwan.
+- NewOswan also provide stub version for the bootrom if you don't own the original console, you can still
+  use the emulator withtout copyright infreigement. (no copyrighted materiel is included with the emulator for obvious
+  reasons)
+- NewOswan use OpenGL instead of SDL
+- Sound is currently not supported
+- NewOswan is currently not meant as a fully operational emulator as this project mostly started as a way to test game
+  and the original hardware. Still the idea is to make it overtime as accurate as possible
+- It is now pure C (the original code was based on a C project with some unneeded C++ here and there)
+- 64-Bit clean, the original code was making assumption on some type size that can break on a 64bit system
+- Build and run on Mac OS X, Linux x86 and ARM, and probably more systems.
+- Some crude debugging tools that can only be enabled at compile time
+- Tons of fancy logs in the console! Like:
+```
+IEEP: RA:143F RD:0006 A:03F C:WRI - Write? Yes : 0006
+IEEP: RA:1440 RD:0101 A:040 C:WRI - Write? Yes : 0101
+IEEP: RA:1441 RD:0016 A:041 C:WRI - Write? Yes : 0016
+IEEP: RA:1442 RD:0000 A:042 C:WRI - Write? Yes : 0000
+WriteIO(6A, 00) [F000:0018h];
+WriteIO(6B, 00) [F000:0018h];
+Icons           H    
+WriteIO(6A, 00) [F000:0018h];
+WriteIO(6B, 00) [F000:0018h];
+```
+- And many more thing I probably forgot about as this project was originally not version managed as it was just a crude
+  hack on the original code and are not in the logs.
+
+### Futur plans
+- Complete refactor of the code.
+- Add a proper CPU debugger
+- Add other nice debugging tool like the GPU status and other things that could be needed. Acheiving the level of the tools
+  provided by Mesen would be nice.
+- Being able to rotate the screen
+- Maybe being able to change the game at runtime instead of start time
+- Full Audio support
+
+
+### The boot rom stubs
+You can find the source and file in the `irom_stub` folder.
+They are identical and for now provide only the logic to boot a cart. There is no bootsplash nor configuration menu.
+A bootsplash may be added later.
+
+Feel free to use these stub for your own emulator if you wish, just be nice and put a line saying you are using it and 
+a link to this project in your documentation :)