grim/guifications2

Noticed that I forgot to get the x11 and win32 specific display files into the cmake build, so moved them into src/ and added them depending on the target
conf_images = \
item_icon_size_big.png \
item_icon_size_huge.png \
item_icon_size_large.png \
item_icon_size_little.png \
item_icon_size_normal.png \
item_icon_size_small.png \
item_icon_size_tiny.png \
item_position_center.png \
item_position_east.png \
item_position_north_east.png \
item_position_north.png \
item_position_north_west.png \
item_position_south_east.png \
item_position_south.png \
item_position_south_west.png \
item_position_west.png \
item_text_clipping_ellipsis_end.png \
item_text_clipping_ellipsis_middle.png \
item_text_clipping_ellipsis_start.png \
item_text_clipping_truncate.png \
window_position_north_east.png \
window_position_north_west.png \
window_position_south_east.png \
window_position_south_west.png
EXTRA_DIST = \
defaults.xcf \
Makefile.mingw \
$(conf_images)
guificationsconfpixdir = $(PIDGIN_DATADIR)/pixmaps/pidgin/guifications/conf
guificationsconfpix_DATA = $(conf_images)