added Lab4_UILabs student distribution

Lab4_UILabs/.gitignore

Lab4_UILabs/Lab-UserInterface.pdf

Lab4_UILabs/UILabs.mp4

Lab4_UILabs/app/build.gradle

.../java/course/labs/todomanager/tests/Test1_SubmitTest.java

...ava/course/labs/todomanager/tests/Test2_DateTimeTest.java

.../java/course/labs/todomanager/tests/Test3_CancelTest.java

...t/java/course/labs/todomanager/tests/Test4_ResetTest.java

Lab4_UILabs/app/src/androidTest/res/drawable/.gitignore

Lab4_UILabs/app/src/main/AndroidManifest.xml

...rc/main/java/course/labs/todomanager/AddToDoActivity.java

...s/app/src/main/java/course/labs/todomanager/ToDoItem.java

...rc/main/java/course/labs/todomanager/ToDoListAdapter.java

...ain/java/course/labs/todomanager/ToDoManagerActivity.java

Lab4_UILabs/app/src/main/res/drawable-hdpi/ic_launcher.png

Lab4_UILabs/app/src/main/res/drawable-ldpi/ic_launcher.png

Lab4_UILabs/app/src/main/res/drawable-mdpi/ic_launcher.png

Lab4_UILabs/app/src/main/res/drawable-xhdpi/ic_launcher.png

Lab4_UILabs/app/src/main/res/layout/add_todo.xml

Lab4_UILabs/app/src/main/res/layout/footer_view.xml