Added add to library dialog when downloading from catalogue (#618)

* Now show snackbar when adding from catalogue

* Code cleanup + added manga favorite event to update favorite drawable when added via snack

* Update SettingsAdvancedFragment.kt

Forgot to check optimize import. I think(hope) I got them all ;).

* Now uses PublishRelay. Manga favorite is now handled in info presenter

* Update MangaInfoFragment.kt

app/src/main/java/eu/kanade/tachiyomi/widget/DialogCheckboxView.kt

@@ -0,0 +1,28 @@
+package eu.kanade.tachiyomi.widget
+
+import android.content.Context
+import android.support.annotation.StringRes
+import android.util.AttributeSet
+import android.widget.LinearLayout
+import android.widget.RelativeLayout
+import eu.kanade.tachiyomi.R
+import kotlinx.android.synthetic.main.dialog_with_checkbox.view.*
+
+class DialogCheckboxView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
+        LinearLayout(context, attrs) {
+    init {
+        RelativeLayout.inflate(context, R.layout.dialog_with_checkbox, this)
+    }
+
+    fun setDescription(@StringRes id: Int){
+        description.text = context.getString(id)
+    }
+
+    fun setOptionDescription(@StringRes id: Int){
+        checkbox_option.text = context.getString(id)
+    }
+
+    fun isChecked(): Boolean {
+        return checkbox_option.isChecked
+    }
+}