Some icons from Community Material aren't available
## About this issue

Some icons aren't available using the library (with xml) from community material typeface.
http://materialdesignicons.com/
Example (Working icon, displayed as expected):
`            <com.mikepenz.iconics.view.IconicsImageView
                android:layout_width="@dimen/spacing_xmlarge"
                android:layout_height="@dimen/spacing_xmlarge"
                android:background="@android:color/transparent"
                android:tint="@color/grey_60"
                app:iiv_size="24dp"
                app:iiv_color="@color/grey_1000"
                app:iiv_icon="cmd-settings" />
`
Example (NOT working icon, isn't displayed):
`            <com.mikepenz.iconics.view.IconicsImageView
                android:layout_width="@dimen/spacing_xmlarge"
                android:layout_height="@dimen/spacing_xmlarge"
                android:background="@android:color/transparent"
                android:tint="@color/grey_60"
                app:iiv_size="24dp"
                app:iiv_color="@color/grey_1000"
                app:iiv_icon="cmd-settings-outline" />
`
cmd-settings.outline is listed in the demo app of the android iconics library... so I don't know why this happens... thanks in advance

## Details
- [ com.mikepenz:iconics-core:3.0.3@aar] Used library version
- [ 27.1.1] Used support library version
- [com.android.tools.build:gradle:3.1.4 ] Used gradle build tools version
- [3.1.4 ] Used tooling / Android Studio version
- Other used libraries, potential conflicting libraries:
`    //Android Iconics
    implementation 'com.mikepenz:iconics-core:3.0.3@aar'
    implementation 'com.mikepenz:iconics-views:3.0.3@aar'
    //material community icons: http://materialdesignicons.com/
    implementation 'com.mikepenz:community-material-typeface:2.0.46.1@aar'`

## Checklist

- [X] Searched for [similar issues](https://github.com/mikepenz/Android-Iconics/issues)
- [X] Checked out the [sample application](https://github.com/mikepenz/Android-Iconics/tree/develop/app)
- [X] Read the [README](https://github.com/mikepenz/Android-Iconics/blob/develop/README.md)
- [X] Checked out the [CHANGELOG](https://github.com/mikepenz/Android-Iconics/releases)
- [X] Read the [FAQ](https://github.com/mikepenz/Android-Iconics/blob/develop/FAQ.md)
- [X] Checked out the [MIGRATION GUIDE](https://github.com/mikepenz/Android-Iconics/blob/develop/MIGRATION.md)

