update README.md for codinginflow#1

README.md

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 Watch the course here: https://www.youtube.com/playlist?list=PLrnPJCHvNZuCfAe7QK2BoMPkv2TGM_b0E
+https://github.com/codinginflow/MVVMTodo
+
+# #1 Layouts & Room Entity
+
+- 꿀팁
+-- ctrl + alt + L : 코드 정리 (formatting)
+-- CoordinateLayout : FAB를 위해
+-- Parcelable Class : 프래그먼트간 전달을 위해
+
+## fragment_tasks.xml
+- CoordinatorLayout : parent
+- RecyclerView
+- FloatingActionButton
+
+## item_tasks.xml
+- RelativeLayout : parent
+-- layout_alignParentStart/End/Top/Bottom
+-- layout_alignStart/End/Top/Bottom
+-- layout_toStartOf/toEndOf/toTopOf/toBottomOf
+- CheckBox
+- TextView
+-- maxLines
+-- elilipsized="end" **If set, causes words that are longer than the view is wide to be ellipsized instead of broken in the middle.**
+- ImageView
+
+## fragment_add_edit_task.xml
+- CoordinateLayout : parent
+- LinearLayout
+- EditText
+- CheckBox
+- FloatingActionButton
+- TextView
+
+## data / Task.kt
+- data class for Room (= Entity)
+- name, important, completed, created, id
+- createdDataFormatted <- get from created