IDEA files exception to gitignore

Добавил в исключения файлы IDEA-студии
Merge pull request #1 from TopTuK/TopTuK_Branche

Top tu k branche
Merge pull request #2 from TopTuK/TopTuK_Branche

Rename login and register view
Merge pull request #3 from TopTuK/master

Add: Main activity XML