Inconsistent character heights when using otf in Windows

[madmalik]

The heights of some lower case characters are inconsistent. This happens for the otf version, but not the ttf version.

See #79 (comment)

[datMaffin]

I am able to reproduce the issue:

Looking at the affected letters (u and e) from the otf in FontForge, reveals that the hinting of both of them is weird

• u: The horizontal hints at the top are too high:
  
• e: There seems to be no hinting information at all:
  

For comparison, this is how fontforge sees the n, which seems to render fine:

[madmalik]

There were some issues with the hinting. I have since corrected them, but I didn't close the issue because I hadn't tested it on windows yet. But the next version will have the correct hints.