Added custom Cell classes for the Twitts

Signed-off-by: Oscar Suro <outercript@gmail.com>
Fixed various issues and performance upgrades

	- Customized cells for twitts
	- User image for each twitt
	- Search results now get displayed in TableView
	- Fixed missing delegate for TwitterRequest
	- Twitter account initialized in main ViewController

Signed-off-by: Oscar Suro <outercript@gmail.com>