ViennaCL 1.0.1 released!

Version 1.0.1 is now available for download.
Most important changes since version 1.0.0:
- Fixed a bug in lu substitute for dense matrices
- Changed iterative solver behavior: Now stops if a certain relative residual is reached
- ILU preconditioning is now fully done on the CPU, because this gives best overall performance
- Improved GPU performance of GMRES by about a factor of two.
- Extended documentation and tutorials