v1.0.0

• Started changelog
• Remove support for ack 1.x
• Use autoload directory to define functions, instead of plugin.
• Add option to auto-fold search results (g:ack_autofold_results)
• Improve documentation, list all options and shortcuts
• Improve highlight option to work when directories are passed or quotes are used.
• Add g:ack_mapping
• Add g:ack_default_options
• Add a help toggle ? to list windows (like NERDTree)

Release coordinated by @kassio.