introduce accents into the color palette.
fix unit tests.
correctly inject the accent highlight groups.
tests for configuring accents directly.
populate all modes with accent colors.
add test for populate accent colors.
automatically provide the red accent.
add additional accents by default.
Merge branch '203' into dev. Resolves #203.
support multiple accents in the same section (#203).
tweak default truncation values so 80-width still shows all (#259).
Add option to hide previous/next modes in ctrlp

New option airline#extensions#ctrlp#show_adjacent_modes allows users to
toggle showing the previous and next modes. The default is the same
behavior as before: show the modes.

Add documentation for new option.

These modes are useful if you switch forward and back through ctrlp's
functionality, but they are visual noise if you don't.
Merge pull request #261 from pydave/add-ctrlp-hide-modes

Add option to hide previous/next modes in ctrlp
add bold and italic accents.
give the line number a bold accent by default.
Solarized improvements.

- Use gray for normal mode bg color
- Add replace mode colors
- Modify solarized dark colors
Modify solarized normal mode tty colors
Solarized modifications.

- Remove 'reduced' option
- Use yellow for insert, red for replace mode
add documentation about predefined parts. resolves #267.
Merge pull request #263 from edkolev/solarized-improvements

Solarized improvements