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- currently implemented for darwin and linux

* size_t nmemb (number of elements) first, then size_t size
* do not assume char is size 1 but use sizeof()
* allocate for char, not pointer to char (found by Michael McConville,
  fixes #261)

Closes #228.

Conflicts:
	Process.c
	Process.h
	ProcessList.c
	ScreenManager.c
	linux/LinuxProcessList.c

Set up environment to move other meters.