Merge pull request #650 from HackerWins/develop

v0.5.10
Restore prev/next functions in core/list.js
Update summernote-ext-hello.js
Extract fontstyle plugin.
 - fixed editor.insertText bug.
remove fontstyle buttons from example.
Merge pull request #694 from HackerWins/feature/extract-fontstyle-plugin

Extract fontstyle plugin from base code.
Fixed jshint error.
Call afterCommand callback after resizing object
Call afterCommand callback after changing shape of object
Update dist files
add dropdown button for data-value property  in hello plugin
Fix typo in comment
Hide handle object explicitly while initializing codemirror
Limit the size of image uploading
Fix merging local language

- English language file should not be overridden
- Deep merge
Merge pull request #708 from AgileLeanWorks/bug/fix_language_merge

Fix merging local language
Improve English, move changelog to separate file, add features
Merge pull request #714 from dandv/develop

Improve English, move changelog to separate file, add features
Merge branch 'feature/drag_drop_lang' of github.com:AgileLeanWorks/summernote into AgileLeanWorks-feature/drag_drop_lang

Conflicts:
	dist/summernote.js
	dist/summernote.min.js
	src/js/Renderer.js
Merge branch 'AgileLeanWorks-feature/drag_drop_lang' into develop