GitLab

Move functions that read process data into LinuxProcess.c
and change flow from a monolithic `ProcessList_scan ->
ProcessList_goThroughEntries` into the following:

```
ProcessList_scan -> (Linux)ProcessList_goThroughEntries ->
ProcessList_scanProcess -> (Linux)Process_update
```

This will allow hooking plugins into the scanning
process.

Other platforms need to be similarly reworked.

This allows plugins to add columns, but they don't update
their values yet.

Apparently a line longer than 255 chars was spotted in the wild:
http://serverfault.com/questions/577939/linux-ps-htop-show-processes-running-for-hundreds-or-thousands-of-days-though-h#comment676098_577939

- replaces uid check from d18e9a48

- uses sysctl(KERN_PROCARGS2) on *BSD
- doesn't work on Linux yet

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.