Add missing include for geteuid() missing declaration
xtm_process_window_show_swap_usage() in process-window.
Fix various compiler warnings from main.c task-manager.c and
app-manager.c.
Added the TaskManager class to hold system information and tasks.
Currently it provides username and hostname based on POSIX functions.
The Swap is now part of the system information and is being displayed in
the statusbar.
Changes touching the build:
- Bumped version to 0.5.0.
- Removed dependency on Xfce libs (it only depends on GTK+-2.0.)
- Updated Makefile with new source files.
- Build ChangeLog through a script (remove it from source tree.)
More generally speaking, the interface is build on top of a GtkBuilder
UI definition, with a personal GtkTreeView and a Settings GObject to
update the information shown on the interface on changes. All the code
is being written with GObjects which will make it a lot easier to
separate GUI code and system code.
