Fix bug in button focus behaviour leading to ugly input and style problemes.

In current implementation of Sync.Button.js the variable _focused
is never set to false - even if a blur event occurs on the button.

This causes some ugly behaviour because focus handling of echo3 and
the browser doesn't match any more.

The main problem is that the renderFocus function of Sync.Button.js
doesn't fire a dom event on the second time geting focus.

See also Mantis Bug-ID: 520
http://bugs.nextapp.com/mantis/view.php?id=520
Push version to 3.0
Futrher alignment to Maven-like naming style.
Ignore javadoc and release dirs.
Merge branch 'hotfix/buttonfocusblur'
Revert "Turn 'X-UA-Compatible' on also for IE9"

This reverts commit 31e164aa1632015c22f7b12e3a4e7a97d441bad0.
Obivously this fix adresses only a special 3rd party component
than Echo3 itself.

For full discussion refer to:
https://github.com/echo3/echo3/commit/31e164aa1632015c22f7b12e3a4e7a97d441bad0