added custom tableview and collectionview cells
added photo gallery
added TSTPhotoProvider.h
refactoring TSTDataProvider observer methods
added replace  method
added TSTListsViewMediator
Merge branch 'custom_cells' of github.com:YuryGrinenko/TSTest into photoFetcher

Conflicts:
	Test_Project.xcodeproj/project.pbxproj
	Test_Project/Model/TSTPhotoProvider.h
	Test_Project/Model/TSTPhotoProvider.m
refactor lists controllers
added NSOperation for image downloading
Merge pull request #1 from YAInternship2014/photoFetcher

Photo fetcher