Finish 4.0.0-beta.1

First beta of codebird-php 3.2.0

Finish 3.1.0

Set version to 3.1.0-rc.1

Update README to capitalise Tweet

Release codebird-php 3.0.0

Set version to 3.0.0-rc.1

Set version to 3.0.0-beta.2

Set version to 3.0.0-beta.1

Finish 2.7.2