Add support for checking if a word is in dict w/o normalizing case

[jamesqo]

I have an application where I want to detect if a given word is an acronym. The way I would like to do this is to do a case-sensitive search for the uppercased string in the dict, e.g. given 'json' convert to 'JSON' and do a case-sensitive search for that. However, enchant_pwl_check is lower-casing the word so I may get false positives.

I just looked through the code, and there seem to be 2 ways to handle this:

1. Add a gboolean normalizeCase flag to the enchant_pwl_check (This would break binary compatibility?)
2. Expose enchant_pwl_contains in the header file

I'll submit a PR for both of these options soon.

[rrthomas]

I agree that exposing enchant_pwl_contains seems the simplest thing to do.

You added a FIXME that it doesn't refresh the word-list. But this is quite easy to work around: first, check with enchant_pwl_check, and if it returns true, then follow up with enchant_pwl_contains (in case it was a false positive).

I'm happy to help land this patch. For starters, please could you get the patch to pass the existing tests, and add some new tests for enchant_pwl_contains?