* test/lisp/term-tests.el (term-line-wrap-no-auto-margins): add test
* lisp/term.el (term-auto-margins): new variable
(term-mode): documentation
(term-termcap-format): mention auto-margins flag
(term-emulate-terminal): support it
(term-reset-terminal): reset it
(term-handle-ansi-escape): notice it
* etc/e/eterm-color.ti: add auto margin capability
* etc/e/README: fix build documentation
* etc/NEWS: mention auto-margins
(term-ansi-face-already-done): Make obsolete
(term--maybe-brighten-color): Remove
(term--color-as-hex): New function
(term-handle-colors-array): Make obsolete in favour of the new
function 'term--handle-colors-list'.
(term--handle-colors-list): New function, that can also handle ANSI
codes 38 and 48.
(term-handle-ansi-escape): Use it
* test/lisp/term-tests.el (ansi-test-strings): Add tests for 256-color
and 24bit ANSI colors
