first usable version of kernel and commands

After an year of hard work, this is a first "usable" version of Jehanne.

sys/include/mouse.h

@@ -0,0 +1,55 @@
+/*
+ * This file is part of the UCB release of Plan 9. It is subject to the license
+ * terms in the LICENSE file found in the top-level directory of this
+ * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
+ * part of the UCB release of Plan 9, including this file, may be copied,
+ * modified, propagated, or distributed except according to the terms contained
+ * in the LICENSE file.
+ */
+
+#pragma src "/sys/src/libdraw"
+
+typedef struct	Channel Channel;
+typedef struct	Cursor Cursor;
+typedef struct	Menu Menu;
+typedef struct 	Mousectl Mousectl;
+
+struct	Mouse
+{
+	int	buttons;	/* bit array: LMR=124 */
+	Point	xy;
+	uint32_t	msec;
+};
+
+struct Mousectl
+{
+	Mouse;
+	Channel	*c;	/* chan(Mouse) */
+	Channel	*resizec;	/* chan(int)[2] */
+			/* buffered in case client is waiting for a mouse action before handling resize */
+
+	char		*file;
+	int		mfd;		/* to mouse file */
+	int		cfd;		/* to cursor file */
+	int		pid;		/* of slave proc */
+	Image*	image;	/* of associated window/display */
+};
+
+struct Menu
+{
+	char	**item;
+	char	*(*gen)(int);
+	int	lasthit;
+};
+
+/*
+ * Mouse
+ */
+extern Mousectl*	initmouse(char*, Image*);
+extern void		moveto(Mousectl*, Point);
+extern int			readmouse(Mousectl*);
+extern void		closemouse(Mousectl*);
+extern void		setcursor(Mousectl*, Cursor*);
+extern void		drawgetrect(Rectangle, int);
+extern Rectangle	getrect(int, Mousectl*);
+extern int	 		menuhit(int, Mousectl*, Menu*, Screen*);