fixed bug in cfb32_fill_rectangle
use c99 syntax for new style struct initializers instead of gcc specific
simplified tolower unsigned char hacks
fixed various sparse warnings
utf8_encode now returns the number of characters copied,
simplified code accordingly
made local functions static
tagged unused function arguments
fixed shadowing issues
added support for GCC attributes for unused arguments and format strings
use snprintf() instead of sprintf()
moved scattered declarations to qe.h
removed duplicate declarations in header files
eb_write() payload argument is now const
fixed crash bug: reset trace_buffer upon deletion
improved trace_buffer readability: trace all pseudo tty streams separately
added missing structure initializers
removed buffered string handling from cutils.h
added new buffered string API for statically allocated buffers (should unify)
small improvements in X11 initialization
improved consistency in tty.c (function names...)
added STDIN and STDOUT streams in QEditScreen to stop using stdin and stdout
use unlocked stream I/O if available (faster)
changed and documented terminal setup and exit sequences
improved charset handling
mode_line functions now return the character count (like snprintf)
put message in do_quote(), do_set_mark(),
added find_window() to locate window in a given direction.
added do_previous_window() for window navigation.
do not split popup window in do_split_window().
allow window navigation with C-X n / C-X p /
C-X up / C-X down / C-X left and C-X right.
added BUFED_ALL_VISIBLE flag to include system buffers in list
display buffer size
added bufed_clear_modified, bufed_toggle_modified.
added bufed_toggle_all_visible, navigation keys.
improved dired mode:
store file details in separate structure
added sorting options, marking options
