changed general colors to exact solarized.

Palette colors are still the generic ones.

It is possible to modify the approximate colors as set in the 256 color
palettes, so solarized aware applications that run in 256 colors match
perfectly the solarized palette while keeping the unaware applications
working fine.

The following command fixes the approximations:
printf '\x1B]4;234;rgb:00/2b/36;235;rgb:07/36/42;240;rgb:58/6e/75;241;rgb:65/7b/83;244;rgb:83/94/96;245;rgb:93/a1/a1;254;rgb:ee/e8/d5;230;rgb:fd/f6/e3;136;rgb:b5/89/00;166;rgb:cb/4b/16;160;rgb:dc/32/2f;