1. Added a launch image
2. Added a pinch and pan gesture recognizer for the hudmode

Recent Searches
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1. Recent searches will now be in the chronological order
2. There will be no duplication in the recent search list.
3. The maximum size of the recent search list is kept as 20.
4. Added a Clear Button in the Recent Searches

Permanently Saving the Recent Searches
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1. All the recent searches will be stored using NSUserDefaults
2. A header file USER_DEFAULTS_KEY.h is created to store the key for the NSUserDefaults
3. Two function loadBookMarksAndRecentSearchesToarray and saveBookMarksAndRecentSearchesToarray created