move handle images to external resources
Merge pull request #96 from leibovic/res

move handle images to external resources
Bug 1049600 - (Part 1) Rename ClearableEditText to SearchBar
Bug 1049600 - (Part 2) Use brand color for search bar underline
Bug 1049600 - (Part 3) Add engine icon to search bar
Bug 1049600 - (Part 4) Use engine name in search bar hint
Bug 1049600 - (Part 5) Use setBackgroundDrawable and fix default edit text background for gingerbread support