* clear interactive window flag upon mode change
* enable interactive mode upon vertical cursor movement
* add more checks for private data consistency
* free shell data upon process exit in non interactive shell buffers
* added shell-command command on M-!
* make kill_buffer_noconfirm() public to remove buffer safely
* add QECharset method probe_func() to test charset likelihood
* probe function is not used for automatic charset detection yet
* fix kmaptoqe.c to use stable sorting and make kmaps reproducible
* fix ligtoqe.c to use stable sorting and make ligatures reproducible
* add set-auto-mode() to (re)select best mode for buffer
* add set-next-mode() on M-m to cycle appropriate buffer modes
* add set-previous-mode()
* add default_mode and saved_mode in buffers to improve mode switching
* add dired mode probing and store st_mode in buffer to detect directories
* add charset, eol_type and buffer in ModeProbeData
* clean mode selection and window buffer attachment (needs more work)
* compute sorted list of appropriate modes in probe_mode
* convert charset and eol_type in mode_probe
* add signatures in buffer priv_data to perform save casts
* move BufedState to b->priv_data, protect mode specific functions
add bufed_mode_probe function, cycling through modes comes back to bufed mode
* move DiredState to b->priv_data, protect mode specific functions
add dired_mode_probe function, cycling through modes comes back to dired mode
* add heading line in dired buffer with directory spec
* protect shell-mode specific functions.
* restart shell in shell() command if exited
* some cosmetics changes (remove useless __unused__, missing messages ...)
* add do_describe_buffer to enumerate all buffer attributes in a popup
* analyze buffer contents and show map of bytes present in buffer
* this eases debugging when non ASCII bytes are hard to see
* add charset_raw for binary files
* improve charset detection for ambiguous cases
* add do_show_coding_system()
* add do_set_auto_coding() to (re)select the best coding system
* handle BOM mark: display as \ufeff and ignore for syntax coloring
* add do_scroll_left_right to adjust x_disp
* add scroll-left on M-( and scroll-right on M-)
* horizontal scrolling is only half functional because display
snaps left scroll to 0 if possible and increments are too small
on graphics displays.
* support 3 types of end of line: Unix, Dos and old style Mac
* detect eol type automatically in detect_charset
* set buffer eol_type together with charset
* transparently convert eol sequence to \n upon reading buffers
characters in eb_nextc().
* transparently convert \n to eol sequence in eb_encode_uchar()
* handle eol types in convert-file-buffer-coding-system: either preserve
current value or force it via charset suffix -unix, -doc and -mac
* change read_charset() to accept eol_type suffix
* add eol_type and eol_char to CharsetDecodeState
* change charset methods to take CharsetDecodeState instead of charset pointers
* display eol_type in mode line if not unix
* prepare support for eol_type support by making char encoding buffer specific
* fix small bugs and unsafe cases.
* fix bug in eb_goto_pos for EBCDIC charsets
* add qe_isaccent() to test for combining marks
* add do_combine_char() command to insert or remove combining marks
* fix some display glitches involving combining marks
* add expand_ligature() and combine_accent() to handle simple ligatures
* change do_what_cursor_position() to display combining marks
* improve do_c_indent to prevent buffer modification if indentation is correct
* simplify do_c_indent_region accordingly
* added c-newline to remove indentation on blank lines
* add free_font_cache()
* add css_free_colors()
* add unload_ligatures()
* add --free-all cmd line option to free memory upon exit for valgrind
* tty.c: fix off by 3 size in qe_realloc. Should be typed
* qe.c: fix invalid pointer reference upon destroying transient buffer
* use qe_mallocz for all structures
* prevent spurious uses of malloc/free/realloc
* pass pointers to pointers to all deletion functions
* use consistent patterns for list deletions
* add more dependencies in Makefiles
