Introduced macros for SMM and dispatch to get rid of the first-level call. Dispatching with one more performance level: (1) specialized M/N/K, (2) inline/unroll M/N/K, and (3) BLAS. The level 2 and 3 can be alternatively supplied by MKL's DIRECT CALL feature. Inlined code is generated by xsmm_knc_gensrc.py (rather than xsmm_knc_geninc.py) to eventually inline Intrinsic code but to maintain the code generation within one script. Code cleanup.