Merge branch 'fix_ccsr'

increment version number in ctf.hpp to 1.5.4

add safeguarding against potential integer overflows in a few places,…

… other minor corrections

address an uninitialized warning and change from read_local to ge_loc…

…al in fast_sym

remove commented out old code

clean up some warnings, update doc links, fix a bad makefile rule

changed mapping logic for weigh indices to better handle existing map…

…pings

Version 1.4.2: various bug fixes, support for input/output from block…

…-cyclic (ScaLAPACK descriptor) layouts, reorganization of examples and addition of new ones (spectral element, algebraic multigrid, correct FFT)

CTF v1.4.1: major bug fixes to memory accounting in sparse contractio…

…ns and construction of tensors with predefined processor grid mapping

CTF v1.4.0: support for contraction of two sparse tensors