Issue mikehaertl#76 Refactor DataFields class

Merge pull request mikehaertl#90 from axessweb/patch-1

Fix for windows

Merge pull request mikehaertl#70 from bravadomizzou/master

Add ability to get form data fields as array

Fix Issue mikehaertl#58 Make handles optional when adding multiple files

Prepare 0.3.1 release

Fix PHP 5.3: used [] instead of array()

Issue mikehaertl#28: Fix error message when copying fails

Update dependency versions

prepare 0.2.2 release

Fix unlink issue with piped instances