first usable version of kernel and commands

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

sys/include/flate.h

@@ -0,0 +1,39 @@
+#pragma	lib	"libflate.a"
+#pragma	src	"/sys/src/lib/flate"
+
+/*
+ * errors from deflate, deflateinit, deflateblock,
+ * inflate, inflateinit, inflateblock.
+ * convertable to a string by flateerr
+ */
+enum
+{
+	FlateOk			= 0,
+	FlateNoMem		= -1,
+	FlateInputFail		= -2,
+	FlateOutputFail		= -3,
+	FlateCorrupted		= -4,
+	FlateInternal		= -5,
+};
+
+int	deflateinit(void);
+int	deflate(void *wr, int (*w)(void*, void*, int), void *rr, int (*r)(void*, void*, int), int level, int debug);
+
+int	inflateinit(void);
+int	inflate(void *wr, int (*w)(void*, void*, int), void *getr, int (*get)(void*));
+
+int	inflateblock(uint8_t *dst, int dsize, uint8_t *src, int ssize);
+int	deflateblock(uint8_t *dst, int dsize, uint8_t *src, int ssize, int level, int debug);
+
+int	deflatezlib(void *wr, int (*w)(void*, void*, int), void *rr, int (*r)(void*, void*, int), int level, int debug);
+int	inflatezlib(void *wr, int (*w)(void*, void*, int), void *getr, int (*get)(void*));
+
+int	inflatezlibblock(uint8_t *dst, int dsize, uint8_t *src, int ssize);
+int	deflatezlibblock(uint8_t *dst, int dsize, uint8_t *src, int ssize, int level, int debug);
+
+char	*flateerr(int err);
+
+uint32_t	*mkcrctab(uint32_t);
+uint32_t	blockcrc(uint32_t *tab, uint32_t crc, void *buf, int n);
+
+uint32_t	adler32(uint32_t adler, void *buf, int n);