More container and tree changes on all platforms regarding memory. This should fix GTK3 memory leaks I wasn't previously aware of... but it will cause all platforms to leak memory if strings returned from dw_container_query_start(), dw_container_query_next() and dw_tree_get_title() are not freed with dw_free() when using version 3.

prefix=@prefix@
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${exec_prefix}/include
 
Name: dwindows
Description: Dynamic Windows Cross platform UI Toolkit
Version: @VERSION@
Libs: -L${prefix}/lib -ldwindows @LIBS@
Cflags: -I${prefix}/include @CFLAGS@ -D@DW_DEFINE@