GitLab

Closes #228.

Conflicts:
	htop.c
	htop.h

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

This is a work-in-progress, code is currently broken.
(Some actions, and notably, the header, are missing.)

On my machine, this gives a ~20% improvement in htop process time use with the default config.

Changes in object model: separate class objects to store vtable. Also, nicer UTF-8 display of big numbers.

(for details see https://sourceforge.net/mailarchive/forum.php?thread_name=CAJpkDYeZpwqcWxZ77wq6bMrnhn-KzkU1xAqb3cU0drfnA3n9FQ%40mail.gmail.com&forum_name=htop-general )

* Performance improvements
* Support for splitting CPU meters into two or four columns
  (thanks to Wim Heirman)
* Switch from PLPA, which is now deprecated, to HWLOC.
* Bring back support for native Linux sched_setaffinity,
  so we don't have to use HWLOC where we don't need to.
* Support for typing in user names and column fields in selection panels.

Fix subtree hiding
Fix reading of CPU values in hidden threads
Fix hiding of zombie processes as kernel threads
Remove "debug proc" code
Code cleanup in processElements

simplify processor data accounting (add CPUData structure)
remove Process_clone trick