[TASK] Initial commit.
[TASK] Add some features.

Sorry for that late commit.
[FEATURE] Sends verify link in email.
[TASK] Verifies email link.
[CLEANUP] Remove needless actions.
[TASK] Adds inline comment.
[UPDATE] Version upto 0.1.0.

Includes only the double opt-in subscription.
[TASK] Adds flexform and basic feature for unsubscribe
[FEATURE] Unsubscribe via two methods.

First you can visit website and unsubscribe by entering your email.
You'll receive an confirmation mail which you have to confirm.
(Spamprotection).

You can also immediate unsubscribe by specific link which contains your
email and your token.
[TASK] Update template mapping.
[TASK] Dont block used emails.

Give them a chance to subscribe again.
[FEATURE] Basic backend module for export.
[RELEASE] v.1.0.0 beta
[TASK] Remove and permanently ignore »mails.txt«
Merge branch 'master' of github.com:pfinkbeiner/finewsletter