Update Android Calculator app

Our app mccPILOTCAL (see Google Play store) must be updated as follows : - give the app some fresh look (buttons and background) - make app compatible (and look nice) with the following screen sizes : Android : 480 x 800 (Galaxy Nexus S) 480 x 854 (Sony Xperia X10) 540 x 960 (HTC Sensation) 1024 x 600 (HTC Flyer) 1280 x 720 (Galaxy S3 - HTC One X - Galaxy Nexus - Sony Ericsson LT26i ) 1280 x 800 (Galaxy Note 7000) Android tablet : 1024 x 600 (Acer Tab) 1280 x 720 (Asus Padfone 2 tablet) 1280 x 800 (Acer A500 - Motorola Xoom) And optionally : - make app run on Blackberry BB10 as Android app - convert / develop same app for Windows Phone / tablet The original source code is sent to you when you start the job