Pull requests: CJK words and Snippet generator

[rsto at paranoia.at]

The CJK word segmentation and snippet pull requests both pass Travis
since middle/end of last week. Did you find time to look at them? Or is
their merge pending decisions on other features/pull requests? I can
keep the PRs rebased against master, but I will wait for your feedback
on the current tranche before migrating remaining features on top of
them. 

Thanks,
Robert 

P.S. They are at https://github.com/xapian/xapian/pull/114 and
https://github.com/xapian/xapian/pull/117