Early versions of Mac OS had problems with static objects in the background.
Thus, reference decrement had been enabled. However, this is problematic
for memory handles, as this implies that memory is never free'd.
This is certainly not a feature, hence reenabling reference decrements for
memory buffers.

Supposedly pretty complete, might receive minor final updates.

Was no longer in use.

Andreas, Denis, and Juraj provided substantial amounts of new code
and should also receive appropriate credits. :-)

* Improved preamble in tutorials and benchmarks
* Mixed CG tag now provides an inner_tolerance() for the low-precision loop

- Kernels are generated in build/ and no longer penetrate the source tree. Old kernel files removed. Users interested in ViennaCL-Nightly should consider creating a symlink viennacl/linalg/kernels pointing to build/viennacl/linalg/kernels and run 'make' in build/ after each pull.
- Issue with trans_prod_impl() in GCC 4.7 solved.
- Virtual destructor added in runtime_wrapper class within kernel generator
- Updated documentation for 1.3.1 release

Initial sf.net commit of version 1.3.0 including a follow-up commit (removal of unnecessary indirection in inner_prod())