Parrot 7.0.1 Hotfix released

We detected and fixed two serious and two minor bugs which required a 7.0.1 hotfix release.

- GC regression --optimize caused by PARROT_CANNOT_RETURN_NULL, which 
was visible on machines with low memory. 
https://github.com/parrot/parrot/issues/1186

This causes segfaults with --optimize, which is the default for nqp
and rakudo, on better (i.e. newer) compilers. The bug was there since
3.6, but turned evil only with 7.0, when packfile got refactored.

- threads deadlock in gc_gms_mark_and_sweep()
https://github.com/parrot/parrot/issues/1187

With cc -O3 the lock code is too far away from the guard, thus causing
our threads example examples/threads/chameneos.pbc to hang, a
regression from 6.11.0

And 2 minor ones for --m=64 or --m=32:

- fix --m=64 with gcc on ppc64 and mips64 #1181,

--m=64 produced wrong ld and linkflags since 6.10, GH #1110

- fix icu probes with --m #1182

We never linked icu again the libs in the configure step, so we failed
to detect wrong architectures, and worse, added wrong arch include and
libpaths to the flags (e.g. amd64 --m=32), causing all sorts of icu
errors, when has_icu=1 but either linking or runtime failed. This
always caused problems.

Parrot 7.0.1 is available on Parrot's FTP site, or by following the download instructions. For those who want to hack on Parrot or languages that run on top of Parrot, we recommend our organization page on GitHub, or you can go directly to the official Parrot Git repo on Github

To clone the Parrot Git repo into a directory called 'parrot', use the following:

    git clone git://github.com/parrot/parrot.git

If you want it to be in a directory other than 'parrot', then just give that as a second argument to clone:

    git clone git://github.com/parrot/parrot.git parrot_foo

The SHA256 message digests for the downloadable tarballs are:

b0e8e5aa17e1f903530ecc05e6aeef405a630890c4ce2ccc7c15b3101c654be2 parrot-7.0.1.tar.gz
ff10df0394880c79a58d6952b031d74004bba02a88ac0db4ed7d89508f429e90 parrot-7.0.1.tar.bz2

Thanks to all our contributors for making this possible, and our sponsors
for supporting this project. Our next scheduled release is at 23 Feb 2015.

Enjoy!