Updated manual about embedded version.

Speed up column-completion in 'mysql'
Don't use ISAM if HAVE_ISAM is not defined
A lot of fixes for the embedded version.  All libraries are now included in libmysqld.a
Changed arguments to convert_dirname() to make it more general.
Renamed files in the 'merge' directory to all use a common prefix.
Don't compile both assembler and C functions on x86

mysql-test/r/auto_increment.result

@@ -9,18 +9,6 @@ a	b	c
 5	5	NULL
 8	8	8
 9	9	9
-a	b
-1	1
-5	5
-3	3
-4	4
-6	6
-a	b	c
-1	1	NULL
-5	5	NULL
-3	3	NULL
-4	4	NULL
-6	6	6
 skey	sval
 1	hello
 2	hey