Our own exemplar parser

[simoncozens]

• Add our own parse function for exemplars
• Tests for exemplar parser

[moyogo]

@simoncozens Two things:

• the function should also handle ranges
• if you're going to copy and paste my code (which doesn't handle ranges) you should add me as a commiter or say so in the commit ;-)

[simoncozens]

Sorry, you're right about the second thing. I'll fix that now. For the first, do we have ranges anywhere?

[moyogo]

@simoncozens Yes, CJK for example, like in data/languages/zh_Hans.textproto where 万-与 is a range.