Add a new option to choose the original Solarized's cursor style.
So, by default now the cursor is white on blue in dark themes and white
on orange/red (depending on visibility) in light themes no matter which
variant is used.
If you prefer a grey cursor, as in the original Solarized, put this in
your `vimrc`:
let g:solarized_old_cursor_style = 1
With normal and low visibility, now the cursor is orange (normal, high
contrast variants) or grey (flat, low variants).
With high visibility, now the cursor is red (normal high contrast
variants) or (darker) grey (flat, low variants).
In order to avoid reverting dc6c1df completely, this commit introduces
underline as a further clue to distinguish matching parentheses. In the
normal and high contrast variants, underline is used for MatchParen when
g:solarized_visibility is set to "low" or "normal", while a dark
background is used when g:solarized_visibility is set to "high". For
flat and low contrast variants, underline is used when
g:solarized_visibility is set to "high" (otherwise, the appearance is
the same as before this commit).
For all schemes other than the flat one, when g:solarized_contrast is
not low, use the same colors as the original Solarized for the status
line, with the exception of the dark high-contrast scheme, where the
colors of StatusLine have been darkened a bit to make them compatible
with WildMenu.
For some reason, using ctermbg=7 causes the ^^^ symbols to appear in the
status line when the high contrast variant is active. That happens both
in terminal and in MacVim. Setting the foreground to 15 fixes the
problem (that is high contrast anyway).
