Update summernote-fr-FR.js

1) Add button toolbar 'superscript' and 'subscript'
2) Finalize button toolbar 'strikethrough'
Create summernote-hu-HU.js

Hungarian language for summernote.
Fixes font select layer
Merge pull request #385 from e2goon/fixes384

Fixes font select layer
Merge pull request #383 from gabemiller/master

Create summernote-hu-HU.js
summernote-da-DK.js

Danish translation for summernote
Merge pull request #390 from LordLyng/patch-1

summernote-da-DK.js
Update summernote-ca-ES.js

Fix bad quotes
Merge pull request #392 from Regisc/master

Update summernote-ca-ES.js
added superscript and subscript buttons
Merge pull request #394 from Remo/sub-sup

superscript and subscript buttons
Replace 'strike' into 'strikethrough'
Merge pull request #397 from HackerWins/strike-to-strikethrough

Replace 'strike' into 'strikethrough'
`xxx.length === 0` to `!xxx.length`, `xxx.length > 0` to `xxx.length`
Extract commands from handler.
Extract variables($window, $scrollbar) from local.
Rename handler to sEvent.
Merge branch 'patch-4' of https://github.com/jginfo/summernote into jginfo-patch-4
Merge pull request #246 from jginfo-patch-4
Add button for inserting horizontal rule(hr)