Update version.

Merge pull request summernote#578 from HackerWins/develop

Fix InsertParagraph bugs and add newline after block on codeview.

Merge pull request summernote#571 from HackerWins/develop

Fix enter key bug.

Merge pull request summernote#564 from HackerWins/develop

hotfix dom editing bug.

Merge pull request summernote#562 from HackerWins/develop

Dom editing

Merge pull request summernote#517 from HackerWins/develop

v0.5.3

Update version and dist files.

Version 0.5.0 Stable