depend capistrano-3.1
disable capistrano v2 lib helper
fix capistrano v3 auto detect git branch and repo_url
use capistrano-rsync replace capistrano v2 deplay_via :copy feature
deprecate set :shared
use task load:defaults
typical integrate capistrano-rails
keep linked_files and linked_dirs defaults is empty array
capistrano/rspec will set current_revision
support http_proxy arguments
bundler can set special environmental variables for http_proxys
remove deploy:setup recipe
add capsum version
whenever recipe for capistrano v3
passenger recipe for capistrano v3
update changelog
Merge branch 'capistrano_v3'
Version bump to 1.0.0.alpha1