ViennaCL 1.0.5 released!

This is the last 1.0.x release. The main changes are as follows:
* Added a reader and writer for MatrixMarket files (thanks to Evan Bollig for suggesting that)
* Eliminated a bug that caused the upper triangular direct solver to fail on NVIDIA hardware for large matrices (thanks to Andrew Melfi for finding that)
* The number of iterations and the final estimated error can now be obtained from iterative solver tags.
* Improvements provided by Klaus Schnass are included in the developer converter script (OpenCL kernels to C++ header)
* Disabled the use of reference counting for OpenCL handles on Mac OS X (caused seg faults on program exit)