Fix Bugs.

fix width and height, and add to ScrollView

53284d9 issue #56 ,Now you can use wrap_content for both layout_width & layout_height for speedometer family:

<com.github.anastr.speedviewlib.SpeedView
        android:id="@+id/speedView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

fix font cut

ea2e6cb issue #50, speed text and unit text will no longer be incomplete for all fonts.

fix Indicator rotation

78965d7 issue #61, No more random rotation after using sv_minSpeed and sv_maxSpeed attributes.