Merge pull request #304 from Metabor/patch-2

renamed StringDateTimeValueConverter to DateTimeValueConverter in doc

Fix Step priorities #293 (#294)

* Fix Step priorities #293

* Update StepAggregator.php

Merge pull request #288 from ruleant/patch-1

fix typo in example

Merge pull request #102 from mRoca/master

Add UTF-8 encoding to CsvWriter

Merge pull request #126 from ushahidi/add-pdo-reader

Add PdoReader

Merge pull request #96 from gries/item_converter_breaks_mappings_fix

Fixed php-error "undefined offset" when adding an item-converter and multiple mappings

Merge pull request #93 from AydinHassan/workflow-result

WIP: Return Result Object

Improve Excel reader performance and compatibility

Merge pull request #80 from ddeboer/csv-delimiter

Change default CSV delimiter to comma (fix #79)

Limit symfony/console version at 2.4