[UI] add widget ConfirmPopup, and refactor alert popup
[UI] improve pets icon performance

1. reduce pets icon size (50k -> 15k)
2. rename pets icon, replace ' ' to '_'
3. use background-image: url(...) to improve UI refresh performance
4. add 'assets/pets' to 'source'
[feature] add project build script
[phonegap] support multi platform, and register phonegap backbutton event
[bug fix] Nexus render css attribute "opacity" cause the black blocks

1. using "background-color: rgba()" to implement css opacity
2. avoid using function.bind(scope)
   this Javascript API is not support on old browser
3. fine tune UI, set Toolbar Header css text-transform to default
[feature] implement backButtonHandler function

when user press mobile back button, ask user to leave or stay
[publish] phonegap build publish setting

App Name: Feed Me
App ID: com.zlargon.CriminalCaseAutoPetFeed

1. change icon
2. add config.xml
3. README.md