[TASK] Remove build file
[CLEANUP] Reformat code via PhpStorm
[TASK] Create ext_autoload.php
[CLEANUP] Remove unneeded class
[CLEANUP] Remove require_once calls

Since 4.3 we can use the autoload to load all classes. Class names and
paths are mapped in the ext_autoload.php file.
[TASK] Do not generate require statements for t3lib paths

Remove all occurences of PATH_t3lib. It does not exist any more.
[TASK] Use local icons only

Copy icon add.gif from 4.5 and all other icons from typo3/gfx/ into
icons such that they are local to the extension only
[FEATURE] Make edit extension work again (6.2+)