First actual production-marked release.

v1.0.0

Removes screaming faces D:

I promise I'll move to semantic versioning after this

(The only change over rc2 is removing the slightly confusing D: emoticons.)

Some UI improvements over RC1

Changes:

• sends file listing to receiver for confirmation (confirmation can be skipped)
• shows sender username to receiver
• some helpfulness improvements in messages

Release for Trying Out

First release considered "maybe usable". Interested to hear what people think.