Pass file paths to key handler via stdin; fixes issue #187
Ignore SIGPIPE, caused by key handler exiting before all files got printed, fixes issue #188
Grouped optional dependencies in Makefile
My personal config.h customizations, including:

 * bigger thumbs
 * different default font
 * when triggering Marking via m, also move to the next item.
 * modified rotation/flip keybindings:

old : new : function

<   : ,   : rotate -90 degrees
>   : ,   : rotate +90 degrees
?   : >   : rotate 180 degrees
\   : .   : flip horizontal
-   : -   : flip vertical
Revert "Use a prefix key to execute the key handler"

This reverts commit 54d7b7f20fc80460fb6160badb6d90e6505a4194.

Conflicts:
	exec/key-handler
	main.c
Specify slideshow delay in milliseconds rather than seconds
Filelist rearrangement command.

Bound to Alt+Left/Right.
Any prefix sequence given will control how many slots the item travels.
This configuration, without a prefix sequence given,
moves the image to the start of the filelist (Alt+Left),
or to the end of the filelist (Alt+Right)
Show markcount when on a marked image
Show coordinates in statusbar when mouse is over image.

Based on a patch by Flavio Calvo.
Added the ability to toggle the coordinate display's visibility.

By default, visibility is OFF.
Toggle it on with -m commandline option,
 or by adding a binding to i_toggle_mouse_pos in config.def.h
 and activating that binding.
Font and slideshow defaults fix, move 'show mouse pos' from F8 to C-F9
Implement relative (percentage) coordinate display option (extension to show_mouse_pos)