[Uim] Suggestion: im-label-name

[YamaKen]

Hi developers,

I suggest new attribute for IM 'label-name'. The attribute
represents human-friently and internationalized IM name such as
4th arg of following register-im.

(generic-register-im
 'pyunihan
 "zh_CN"
 "UTF-8"
 (N_ "Pinyin (Unicode)")
 (N_ "PinYin input method (Unicode version)")
 pyunihan-init-handler)

This simplifies the lazy loading implementation and custom
im-name related custom variable definition.

We could also provide corresponding C API such as follwing, but
I think that it's not required yet.

const char *uim_get_im_label_name(uim_context uc, int nth);

I'll rewrite all related codes if nobody disapproved for a
while. Please post your comment.

-------------------------------
YamaKen  yamaken at bp.iij4u.or.jp