Issue #466 added indentation for subpages
Broken Selected Menu in Comments Page

The selected menu not working with `and`
Update admin.css

1. Fix: The Delete buttons are transitioned, but not for the Save buttons.
2. Shift the empty page icon to the right by 150 pixels.
Update global.php

Add some language item for new future attributes.
Add data-atribute for AJAX Message

Add data-atribute for AJAX message in button with value from selected language.
AJAX in Post Editor + Keyboard Shortcut for Saving

In addition, here I also show the progress indicator in the title bar because I don't want to edit the CSS layout just to make the notification message sticked to the top of screen (whenever you scroll the page). 

Considering now the users can save or update the post by pressing key combination **CTRL + S**, so they no longer need to scroll the window up just to see what happens with dat **Save** and **Update** button plus the notification messages. At least now we can see the saving progress through the title bar without having to scroll the screen up! 

Maybe not realy important for version 0.9, but if you want to implement my idea to the future versions...
Unnecessary class "btn" removed.

This breaks the ability to add your own class and doesn't have any
usage.
Improved slugify() function.

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo
ligula eget dolor.
Old:
lorem-ipsum-dolor-sit-amet-consectetuer-adipiscing-elit-aenean-commodo-ligula-eget-dolor
New:
lorem-ipsum-dolor-sit-amet-consectetuer-adipiscing-elit-aenean-commodo-ligula-eget-dolor

Weit hinten, hinter den Wortbergen, fern der Länder Vokalien und
Konsonantien leben die Blindtexte. Abgeschieden wohnen Sie in
Buchstabhausen an der Küste des Semantik, eines großen
Sprachozeans.
Old:
weit-hinten-hinter-den-wortbergen-fern-der-lander-vokalien-und-konsonantien-leben-die-blindtexte-abgeschieden-wohnen-sie-in-buchstabhausen-an-der-kuste-des-semantik-eines-groen-sprachozeans
New:
weit-hinten-hinter-den-wortbergen-fern-der-laender-vokalien-und-konsonantien-leben-die-blindtexte-abgeschieden-wohnen-sie-in-buchstabhausen-an-der-kueste-des-semantik-eines-grossen-sprachozeans

Skromny młodzieniec bo tak piękny i książki.
Old:
skromny-modzieniec-bo-tak-pikny-i-ksiki
New:
skromny-mlodzieniec-bo-tak-piekny-i-ksiazki

This--is-a-totally--weird-check!!!-believe-me-i'm-lying
Old:
this-is-a-totally-weird-check-believe-me-im-lying
New:
this-is-a-totally-weird-check-believe-me-i-m-lying

     Кюм эа ныморэ
факэтэ, диам чингюльищ дуо нэ.
Old: -
New:
kyum-ea-nymore-fakete-diam-chingyul-ish-duo-ne

     Υσυ εσε δοσθυς ιν.
Δετρασθο αντιωπαμ πρι συ, ομνις αυτεμ μαλυισετ ατ κυι.
Old: -
New:
ysy-ese-dos8ys-in-detras8o-antiwpam-pri-sy-omnis-aytem-malyiset-at-kyi

Déi wellen Fielse um, Fläiß d'Loft rëm jo.
Old:
dei-wellen-fielse-um-flai-dloft-rem-jo
New:
dei-wellen-fielse-um-flaeiss-d-loft-rem-jo
Slug generation optimized.
Optimized labels and added slug.js to edit.js.
Updated all labels.
Update helpers.php

`slug()` regex is too specific. Make it not working in **Custom Field** and **Site Variables** key.
Merge pull request #552 from tovic/patch-4

Update admin.css
Merge pull request #577 from tovic/patch-19

Update helpers.php
Merge pull request #567 from FabianBeiner/0.9-dev

0.9 dev
Merge pull request #561 from tovic/patch-12

AJAX in Post Editor + Keyboard Shortcut for Saving
Merge pull request #559 from tovic/patch-10

Add data-atribute for AJAX Message
Merge pull request #557 from tovic/patch-8

Update global.php
Merge pull request #551 from tovic/patch-3

Broken Selected Menu in Comments Page
Merge pull request #530 from limbenjamin/0.9-dev

Issue #466 added indentation for subpages