v2

v2.1

Removing reference counters in BLAS interface due to major performance issue on multi-core (-socket) systems. See BLAS/LAPACK Interface on how to use the modified interface (and avoid errors).
New, scalable matrix-vector multiplication implemented.
Using generic datatype for SIMD instructions, thereby enabling generic SIMD algorithms, e.g. for BEM kernels, and fast adoptation of new SIMD instructions, e.g. AVX2.
Started to use block-wise operations if dense matrices are combined with blocked matrices (e.g. during matrix multiplication) instead of vector operations.
Removed TVirtualVector (replaced by TScalarVector).
Fixed issue with MatrixMarket format (leading whitespaces).

Major Changes
- Switched from OpenMP to Threading Building Blocks as interface to shared memory parallelism, thereby also changing most algorithms to task-based parallelism.
- Reducing dependency on external libraries by using C++11 features. Also replacing some classes by default C++ versions (finally removing old code).
- Alternative, non-recursive, level-wise ℋ-LU factorisation based on explicit block dependencies, which provides far better speedup on many-core systems, e.g. Intel MIC architecture.
- New ℋ-LU factorisation algorithm also applicable in distributed environments, yielding better load-balancing (albeit with limited speedup).
- Added support for multiple CPUs to many algorithms, e.g. in clustering, norm computations, matrix-vector multiplication and solves, ℋ²-convertion.
Minor Changes
- Optimised BEM kernels for Intel MIC architecture.
- Introduced TLinearOperator for operators not supporting TMatrix functionality, e.g. factorised matrices.
- HLIBpro file format changed due to internal changes and due to some bugs in the format. However, backward read compatibility for most files written with earlier versions is kept.
- Added Support for Cairo library, thereby providing PDF output.
And of course: many smaller feature upgrades and bug fixes.