sbcl 1.0.55 released

changes in sbcl-1.0.55 relative to sbcl-1.0.54:  * enhancements to
building SBCL using make.sh:    ** --fancy can be specified to enable
all supported feature enhancements.    ** --with-≤feature> and
--without-≤feature> can be used to specify       which features to
build with.    ** --arch option can be used to specify the
architecture to build for.       (Mainly useful for building 32-bit
SBCL's on x86-64 hosts, not       full-blows cross-compilation.)  *
enhancement: extended package prefix syntax
<pkgname>::<form-in-package>    which allows specifying name of the
default interning package for the    whole form.  * enhancement: when
*READ-EVAL* is true, arrays with element type other than    T can be
printed readably using #.-based syntax. (Thanks to Robert Brown)  *
enhancement: MAKE-ALIEN signals a storage-condition instead of
returning a    null alien when malloc() fails. (lp#891268)  *
enhancement: SB-EXT:PRINT-UNREADABLY restart for PRINT-NOT-READABLE
conditions can be conveniently accessed through function with the same
   name, analogously to CONTINUE.  * enhancement:
SB-EXT:*SUPPRESS-PRINT-ERRORS* can be used to suppress errors    from
the printer by type, causing an error marker to be printed instead.
(Thanks to Attila Lendvai)  * enhancement: BACKTRACE and DESCRIBE now
bind *PRINT-CIRCLE* to T, and    generally behave better when errors
occur during printing.  * enhancement: the test runner now takes a
--report-skipped-tests argument    to report the individual tests
skipped as well as the number of skipped    tests.  * enhancement:
undefined functions now appear in backtraces as ("undefined
function") instead of ("bogus stack frame") on x86oids.  *
enhancement: detected deadlocks no longer cause stderr to be spammed,
and    deadlock errors are reported in an easier-to-decipher manner.
* enhancement: DESCRIBE on type designators reports the expansion in
more    cases.  * enhancement: SBCL now provides either an explicit