Bug fixed for compatibility with Piwigo 2.6 and 2.7

New languages:
* Catalan (Català [CA]), thanks to josep.torne
* Czech (Česky [CZ]), thanks to sichr
* Estonian (Estonian [EE]), thanks to kersta
* Hungarian (Magyar [HU]), thanks to miky
* Latvian (Latviešu [LV]), thanks to agrisans
* Polish (Polski [PL]), thanks to K.S., T00kie
* Portuguese Brazil (Brasil [BR]), thanks to hespanhol
* Portuguese (Português [PT]), thanks to ANO
* Chinese (中文 (简体) [CN]), thanks to dennisyan

Bug with edit form buttons was fixed.

Fixed bug with RSS icon.

1. Now every post has its own page and link.
2. Every page of blog has its own page and link.
3. Pagination was improved.
4. Added RSS feed.
5. Now you can show your blog on category page.

Added few translations. Thanks for Piwigo Team!

Added compatibility with "ExtendedDescription" plugin. Now You can insert an album or a photo, and multilanguage descriptions in blog name, blog description and post headers. Read "ExtendedDescription" help.

You can post a blog on a separate page.
You can change the appearance. You can choose date format, show or hide number and date of post.
Template has been improved.

Now working with 2.4.3

- Added Dutch (Nederlands NL) Thanks to Cris.

- You can now create, delete or edit posts with html-tags.
- You can now change name of blog.
- You can now change number of posts per page.