rm unused calc.*

code cleanup using 'cppcheck'.

classes and variables.

Corrected include paths ../trivia, ../readline.

- some #include <iostream>
- cmake: SOURCE signature was deprecated

first use of C++ ranged for loop in mem.cpp

existing citations

PSpec S becomes s.

Refactored; basics moved to libtrivia

  exe/ls-includes.rb

- 64bit corrections

  especially for log axes (CAxis::close_enough)