ccv_fontFamily attribute added

[faramarzaf]

I added ccv_fontFamily attribute to the project.
You just need place your .ttf fonts in asset folder.
Then xml layout should be like this.

    <com.github.okdroid.checkablechipview.CheckableChipView
        android:id="@+id/chip2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:ccv_fontFamily="YOUR_FONT.ttf"
        android:color="@color/colorAccent"
        android:text="Sample 2"
        app:ccv_checkedTextColor="?android:textColorPrimaryInverse"
        app:ccv_outlineColor="@color/colorAccent"
        app:ccv_outlineCornerRadius="6dp"
        app:ccv_outlineWidth="2dp" />