Invalid token alignments

[mlj]

A few tokens in latin-nt are aligned to non-existing tokens in greek-nt:

latin-nt.xml is invalid
* Token 492183: aligned to token greek-nt:491658 which does not exist
* Token 492184: aligned to token greek-nt:491659 which does not exist
* Token 492185: aligned to token greek-nt:491660 which does not exist
* Token 492186: aligned to token greek-nt:491661 which does not exist
* Token 492187: aligned to token greek-nt:491662 which does not exist
* Token 492188: aligned to token greek-nt:491663 which does not exist
* Token 492189: aligned to token greek-nt:491664 which does not exist

[mlj]

This is fixed in release 20180408.