Add file format structures page

File-formats-structures.md

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+## File formats structures
+
+### TIM
+
+See http://psx.arthus.net/sdk/Psy-Q/DOCS/FileFormat47.pdf , p.179 
+
+```c
+typedef struct RGB_PIX {
+    u_int  R:5, G:5, B:5, STP:1;
+    } RGB_PIX;
+    
+// Some structures to handle TIM files 
+typedef struct PIXEL {
+    u_long bnum;
+    u_short DX, DY;
+    u_short W, H;
+    RGB_PIX data[]; 
+} PIXEL;
+
+typedef struct CLUT {
+    u_long bnum;
+    u_short DX, DY;
+    u_short W, H;
+    u_short clut[]; 
+} CLUT;
+
+typedef struct TIM_FILE_CLUT{
+    u_long ID;
+    u_long flag;
+    u_long clut;
+    PIXEL pixel[];
+} TIM_FILE_CLUT;
+
+typedef struct TIM_FILE{
+    u_long ID;
+    u_long flag;
+    PIXEL pixel[];
+} TIM_FILE;
+```