add efficient filesystem handling for guard
Revert "add efficient filesystem handling for guard"

This reverts commit 6ba615c5866021a30d6b2c50ae33044b180dd14b.
Merge branch 'official'
Merge branch 'official'
add event_participants_path link
add event participants list view
add joined field to event_participants table
participant can check in event now
participants#index view used new layout now
sort by user.login as participant list
Resize uploaded images
Dispaly image name
Use minimagick instead of rmagick
use zeus to speed up rails. #227
remove jruby head, ruby1.9.2 travis-ci matrix.
add photo uploader test. #228
Merge pull request #235 from yesmeck/feature/228-resize-image

Resize image
Merge pull request #238 from saberma/saberma-bug/remove-jruby-head-and-ruby-1.9.2-travis-matrix

travis-ci 不要测试  jruby head, ruby1.9.2 环境
Merge pull request #237 from saberma/saberma-enhancement/227-use-zeus-to-speed-rails

使用 zeus 来加速 rails 环境启动
add test code