Try to parse font styles better

[sjorssnoeren]

Some fonts do not have their metadata table correctly set up, resulting the familyName is not correct. For example Geomanist Regular in the example directory has this done. Output is familyName: Geomanist Regular Regular Webfont'

[sjorssnoeren]

First attempt to fix those errors is done, try to find another way to be more consistent with fonts that provide those metadata. Maybe try to parse "Light" or "Medium" from font names and act upon. Maybe give the user more control of these values as well.