Use `_draft_or_post_title()`, which will give us a nice default title if no post title exists.
Version bump
Update readme with mention of fix
Merge pull request #231 from Automattic/fix-calendar-titles-231

Calendar: Posts without titles appear broken
Clean the post cache after using `$wpdb->update()`

On setups with a persistent object cache, the post cache needs to be cleared upon data alteration. Otherwise, future requests / transformations could use stale cache data.
Persist the current value for the `post_date` field when a post is updated.

In `wp_update_post()`, core will reset the `post_date` field if the post currently has a status of `draft`, `pending` or `auto-draft`.
The Edit Flow calendar uses the `post_date` field as the canonical reference for the post's position on the calendar.
To prevent the post from moving to the current date when it's updated, we need to persist the `post_date` value for the post.
Update readme with bugfix mention
Don't try to persist `post_date` if `post_date_gmt` is set.

`post_date_gmt` is how WordPress tracks whether a post is scheduled or not. If a post is scheduled, Edit Flow's calendar will handle the post differently.
Merge pull request #225 from Automattic/fix-calendar-post-date-225

Saving a change to a post removes its far-future position in the calendar
A new German-language translation, courtesy of @Circleview
Ignore `.DS_Store`
Update readme with props for #233
Merge pull request #233 from Automattic/german-trans-233

German translation for edit flow
Use `get_the_terms()`, which offers some natural cachy goodness
Merge pull request #234 from Automattic/cachy-goodness

Use `get_the_terms()`, which offers some natural cachy goodness
Introduce and use a new `get_core_post_statuses()` method to get an array of default post status objects
Introduce an internal object cache for repeat requests to `get_custom_statuses()`
Leverage the internal object cache when using `get_custom_status_by()`
Rename our cache variable for verbosity
Introduce an internal object cache for `get_editorial_metadata_terms()`