Rather than exiting with error.

Now xmenu detects if a menu has an icon, and if it doesn't have, the
menu will not have the gaps fgor icons, making the -i flag unecessary
to disable the padding.   The -i option is still necessary, however,
to speed up xmenu loading, since it disables imlib2 initialization
routines.

Also changed license.

Redrawing an icon every time the cursor moves between items costs a lot
of time.  So now each icon is drawn once, and s copied when needed.

Changing config.cursx and config.cursy to config.posx and config.posy.
Adding the parseposition() function.

Widths and x positions no more depend on item->h.

• Adding support for gaps (#3)
• Adding more comments and categorizing function declarations.
• Adding support for EWMH properties (xmenu look is now consistent
  in some window compositors).
• Changing how configuration is done (now all configuration belongs
  to the config structure).

commit b0f37c9fdb
Author: phillbush <phillbush@cock.li>
Date:   Mon Jun 29 09:58:36 2020 -0300

    Compile time error fixes

commit e6bf27768f
Author: Karl Martin <karlmartin895@gmail.com>
Date:   Sun Jun 28 23:08:02 2020 -0400

    v1.01

    add: user can set gap width prefs

commit 0cca216309
Author: Karl Martin <karlmartin895@gmail.com>
Date:   Sun Jun 28 23:04:10 2020 -0400

    INIT: func addition + error fix

    hack + prefs: extra x,y padding for initial menu
    add: x padding for child menus
    fix: 2x compile time errors

Rather than setting the padding.

And adjusting the geometry of items.

Renaming calcmenu() to setupmenu() and shrinking it by calling two
new functions: setupmenusize() and setupmenupos().

I moved all the geometry related code to calcmenu().

The pro is that geom is now a local variable rather than global;
and that all geometry-related code is now in one place.

The con is that it weakens performance a little bit since some
variables, such as the border, have to be reset after the window
creation.

• Parsing of stdin was simplified by using conventional stdlib functions
  rather than parsing the stdin byte-by-byte.
• Splited parsing of textual input and building of internal data
  structures into two different functions.

When the item->label and item->output are the same, XMenu now only
strdup() the item->label and make item->output equal to item->label.
This saves memory when the user do not write a output specification
in the input.

• Updated manual page (removing mention to the removed -w option).
• Removed unused variables (dc.d).
• Freeing item's label and output.

The position didn't take into account the menu borders.
Also, freeing allocated menus and items.