restore histor.dat output in IC

fix many warnings

removed loops over multiple files per process - that feature was dead

write_displ is a dead fn - replace its call with a stop stmt

C style comments in a C file

timer for reading d2wall

timer for writing restarts

don't use C++ comments and declarations in C

timer for reading of restart and geombc

remove commented code

write the git hash to a copy of input.config in the build directory

fix warnings

the clang compiler does not like empty files

initialize pointers

incorrect header guard

fix various warnings

mhmmmm... bugs it creates, copy and paste does

don't use variable length arrays

initialize variables, and compare like types

initialize variables

don't use variable length arrays

hard fail if computeMHSize is passed a bad version number

a few more warnings

clean up warnings from variadic macros

missed a 'long long int' replacement

remove commented code seemingly related to aligned mem allocations

unsigned long long requires C++11 - an unecessary requirement

on my laptop using GCC g++ 5.2.0 unsigned long and unsigned long long are both eight bytes