Merge pull request #53 from Kloadut/master

Small enhancements and fixes
Merge pull request #54 from Kloadut/master

[fix] .app is a folder
Merge pull request #55 from Kloadut/master

[fix] Proper Mac OS X package
[fix] Do not set appName is node-webkit-builder and in the tray icon
Add icon on notifications (Mac OS 10.9+)
build
[doc] Update README.md
Merge branch 'master' of https://github.com/cozy-labs/cozy-data-proxy
[doc] Update README.md
[fix] Drastically increase the speed of first synchronization + fix delete configuration in GUI