Space between glyphs' outermost strokes and glyphs' bounds is not honored
This is best explained with an example => the following two icons look exactly the same when displayed using the iconics library when they are not supposed to
- a 8x8 square inside a 12x12 box 
- a 4x4 square inside a 12x12 box 

The reason for this being that the space between a glyph's outermost strokes and glyph's bounds is not honored

_Visual example:_ Look the following icons - arrow-left, arrow-small-left (similarly for down, up & right) 
- Looks as it should on [Octicons](https://octicons.github.com/) (the small icons are smaller than the normal ones)
- Iconics's [demo app](https://play.google.com/store/apps/details?id=com.mikepenz.iconics.sample) (the small icons are the same size as the normal ones)
