Reduce history size

Large history size increases history GC time...
indent: recover Emacs 24.3 behavior
Add a guard for Emacs < 24.4
local: customize autofill
local: customize clipboard
local: customize menubar
local: customize font
local: customize ml coding style
local: customize rst
local: customize whitespace
local: customize yes-or-no
local: load local configuration
local ginger: add ginger.el
local: load package local
local linum: customize linum
local howm: customize howm
local color-theme-solarized: customize color-theme-solarized
local font: customize font for osx
local color-theme-solarized: apply on osx
local osx: add some modifiers