cterm=reverse not honored; only term=reverse was

This patch makes Airline honor the `cterm=reverse` syntax attribute.
Merge pull request #549 from sunaku/cterm-reverse

cterm=reverse not honored; only term=reverse was
Added extension for tpope/vim-capslock
Merge pull request #559 from Wraul/feature_capslock

Added extension for tpope/vim-capslock
also redraw the statusline for :AirlineRefresh (for #563)
Added CtrlP support, refined visual and replace mode colors.
Merge pull request #564 from freeo/master

Improved my theme kalisi
bugfix for a tabline refresh problem
Merge pull request #571 from perkint/perkint-tabline-refresh

bugfix for a tabline refresh problem
Preserve section c text for inactive windows

- Closes #573
Merge pull request #576 from qstrahl/master

Preserve section c text for inactive windows
Merge remote-tracking branch 'source/master'