Dev: print scopes, dagger modules & entry points

* Using reflection to read into Dagger object graph
* Dagger keeps a Map<Inject, Module>. We transform that back into a Map<Module, List<Inject>>
* Using "." as a first line char in case it'd be whitespace, because Logcat hates white spaces
* Using backquotes for last child (you were right @jw, it looks better)
* Splitting the code for "printing a tree" from the one that transforms scopes, modules and injects into nodes.
* Moar tests

```
Mortar Hierarchy:
SCOPE Root
+-MODULE com.example.mortar.model.Chats.Module
| `-INJECT com.example.mortar.model.Chats
`-SCOPE com.example.mortar.core.Main
. +-MODULE com.example.mortar.core.Main.Module
. | `-INJECT com.example.mortar.core.MainView
. +-MODULE com.example.mortar.android.ActionBarModule
. | `-INJECT com.example.mortar.DemoActivity
. `-SCOPE com.example.mortar.screen.ChatListScreen
.   `-MODULE com.example.mortar.screen.ChatListScreen.Module
.     `-INJECT com.example.mortar.view.ChatListView
```