* The previous convention of !* ... *! are now true block comments,
  i.e. they are parsed faster, don't spam the goto table and allow
  embedding of exclamation marks - only "*!" terminates the comment.
* It is therefore now forbidden to have goto labels beginning with "*".
* Also support "!!" to introduce EOL comments (like C++'s //).
  This disallows empty labels, but they weren't useful anyway.
  This is the shortest way to begin a comment.
* All comment labels have been converted to true comments, to ensure
  that syntax highlighting works correctly.
  EOL comments are used for single line commented-out code, since it's
  easiest to uncomment - you don't have to jump to the line end.
  This is a pure convention / coding style.
  Other people might do it differently.
* It's of course still possible to abuse goto labels as comments
  as TECO did for ages.
* In lexing / syntax highlighting, labels and comments are highlighted differently.
* When syntax highlighting, a single "!" will first be highlighted as a label
  since it's not yet unambiguous. Once you type the second character (* or !),
  the first character is retroactively styled as a comment as well.

The macro prefix was changed from ^F to ^K.

* NOTE: Selections are currently only used to highlight search results.
* The default selection colors were not always visible well with default settings (--no-profile)
  and they were not uniform across platforms.
  On Curses, the selection would be reversed, while on Gtk it had a lighter foreground color.
  They are now always reversed (black on white background).
  The default styles do not assume any color support - they use only black and white.
* Since these defaults cannot possibly work on every color scheme,
  color.selfore and color.selback has been added to color.tes.
  All existing color schemes have been updated to configure selections as reversed
  to the default colors.
  This especially fixes selection colors on Gtk.
* On solarized.tes, the caret style was already distinct from inversed default colors.
  On terminal.tes, the color of the caret is now bright white, so it stands out
  from the selection colors.
* In Curses, the caret color is currently __not__ applied to the command line where
  it is continued to be drawn reversed.
  The command line drawing code is considered deprecated and will eventually be replaced
  with a Scintilla minibuffer.
* In Gtk, we now apply the caret style to the commandline view as well.
* Fixed the comment color in solarized.light.

 * use black on light white as the default popup colors
   (e.g. in --no-profile mode). this looks less annoying than
   black on light blue and is more often more readable
   (since light blue will be rendered quite dark often).
   It's no longer necessary to highlight the popup with (distinct)
   colors.
   Keeping the foreground black ensures that there's a brighter
   foreground color for bold entries in case the terminal does
   not support bold fonts.
 * the `terminal.tes` scheme keeps the default popup style.
   However since it uses white on black as the default colors,
   this will often still stand out from the message line
   (on 16 color terminals).
 * `solarized.tes` now uses a similar high-contrast popup style
   with either a bright or dark background.
   The foreground colors have been chosen so that bright variants
   exist for non-bold terminals - although these bright variants
   do not stand out very much.

 * see http://ethanschoonover.com/solarized
 * I don't know if I want this port to be linked into
   the main solarized repository as it is certainly not perfect.
 * However both light and dark modes are supported and
   usable since to SciTECO's new theming support.
 * Set -U[solarized.light] before munging to enable light
   mode.
 * Registers function key F5 to toggle between light and
   dark modes.
 * Works on ncurses (with some restrictions) and almost all
   other PDCurses ports.
   GTK+ also works somewhat, but not all parts of the GTK+
   UI are currently themable.

 * the RGB values of the 8 standard colors defined by color.tes
   were wrong (i.e. did not correspond to the normal 8 color codes
   defined by Scinterm but only the bright versions).
   Except for `color.black` which referred to terminal color 0.
 * now we define the 16 colors defined by Scinterm, allowing color
   schemes to explicitly use bright color versions without using the
   bold attribute. On 8 color terminals, the bold attribute might
   still be the only way to get a bright color.
 * terminal.tes: Use bright default color instead of relying on bold
   to get bright color versions. This is especially important for
   comments which where relied on bold black to be rendered grey.
   This did not work by default on terminals supporting bold fonts
   (e.g. OS X Terminal) or GTK+. The scheme now works on more
   terminals out of the box and on GTK+ and is thus a good default
   color scheme.
 * Color schemes will now also define the default style, the line number
   style and caret foreground/background.
   `color.calltip` is now also defined for STYLE_CALLTIP and can later
   be used to style SciTECO's custom popup widget.