Fixing the latex2html problem with \bar macro (replaced by \bar{}).

Modification in order to compile on non-Unix platforms.

Added missing capability to extract solution step time to extractor.py

Added important note on using absolute paths with configure

Fixed major bug causing invalid assembly of symmetric DSS sparse

matrices (SMT_DSS_sym_LDL and SMT_DSS_sym_LL). The unsymmetric variant 
SMT_DSS_unsym_LU has been assembled correctly.