Readme: Fix typo

Prior to tagging: Increment versions, add changelog

Merge pull request #263 from Automattic/hotfix/261-set-flag-correctly-master

Post Public, meta: Set the flag correctly to re-allow updates to meta

Add readme.txt as per WordPress.org guidelines

Readme updates.

Switch to asynchronously creating empty translations to avoid slowing down the post saving process too much.

Mark as 1.5

Use the default language text direction for translations which have empty content or have the old `_bbl_default_text_direction` post meta field.

Add the option to immediately create an empty translation when a post is marked as ready for translation. This means a translation will be created which falls back to its default language content. The translation will be subsequently updated when the translation job is marked as complete.

Do not allow new non-default-language posts to be created at the capability level. Prevents unwanted 'Add New' links showing up.

Now we have a fully functional translation job workflow we don't need to hide the Edit link for translations. This allows translations to be edited using the translation workflow screen instead of the regular post editing screen.

Improve the title text on the translation editing screen.

Introduce a `Babble_Meta_Field_Editor` class for translating post meta fields which need a TinyMCE editor.

Use CSS to hide TinyMCE QuickTags buttons rather than removing them using the settings. This allows us to maintain the toolbar's height when switching between Text/Visual.