Browser: add a square tag map

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Browser: each page now manages its own model

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Browser: clean up a bit the code used for managing the update of the model for a Page

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Utils: add a DatePicker and TimePicker, forked from meegotouch's implementation

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Browser: add a Flickr Photos Search page, and its corresponding results page

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>