Implemented dialog for icon properties.
EDEBUG, EWARNING, EASSERT replaced with E_DEBUG, E_WARNING, E_ASSERT
ehelp:
Imported ehelp. It is meant for displaying ede help or some of
documented programs in the browser, no matter where help is installed.
Remanining thing is to be added in configure script so it can set correct
paths, when configure be written.
Documented ehelp.
* DND now should work reasonable (still not finished DND on icons)
* Added menus (icon specific, desktop)
* Icon renaming works too
* Some code to change icons fonts (unfinished)
* Desktop main instance will be now first created and then call rest of
init data. This will allow init data to re-use desktop instance and peek
it's own data (area() for example). Previously, calling such functions would
crash app since constructor didn't finished with creation of desktop instance.
