[Add] column to task table

[Add] task list

[Add] LiveDataReactiveStreams for converting stream to livedata

[Add] save task to db

[Add] task screen

[Add] dimens.xml

[Add] android design support library

[Clean] packages

[Add] MainActivity with databinding

[Add] di with dagger2

[Add] Dagger2

[Add] Android Architecture Components

[Add] project

Initial commit