Saucy now open for development

[Matthias Klose]

Saucy is now open for development, with syncs from unstable currently running.
The development version starts with updated versions of GCC and boost.

 - GCC 4.8 is now the default compiler, introducing among other things
   improved C++11 support, AddressSanitizer , a fast memory error detector,
   and ThreadSanitizer, a tool do detect data races.
   Find the complete list of changes at [1].

   Information on porting to GCC 4.8 from previous versions of GCC
   can be found in the porting guide [2].

   The cross compilers for armhf, arm64 and powerpc default to 4.8 as well.

 - Glibc and binutils updates will follow later during this cycle.

 - boost was updated from v1.49 to v1.53.

Please check your uploads in a saucy chroot, don't just test in a raring
environment. See [3] how to setup such a development chroot.

[1] http://gcc.gnu.org/gcc-4.8/changes.html
[2] http://gcc.gnu.org/gcc-4.8/porting_to.html
[3] https://wiki.ubuntu.com/DebootstrapChroot