Allow to pass objects to ItemConverter instances

Remove type hint from in Workflow::filterItem

Remove type hint from in Workflow::convertItem

Remove typehint from WriterInterface
Use official PHPExcel package
Add community
Improve docs
Improve docs
Return errors correctly, even if CSV Reader has not yet been processed
Fix #26
Remove useless $orginalItem from WriterInterface and fixed the phpdoc in WriterInterface
Added testcase for objects
Allow fewer elements than column headers in CSV's (e.g. for Outlook 2010).
Added strictness logic, allow fewer elements than headers if not strict, reimplemented strict tests.
Added .gitignore for lock and vendors.
Merge pull request #34 from simpleweb/gitignore

Added .gitignore for lock and vendors.
Merge pull request #33 from simpleweb/csv-allow-fewer-elements-than-column-headers

Allow fewer elements than column headers in CSV's
Set strict to allow either shorter or longer data rows
Added tests to validate that non-strict CSV parsing allows for > number of line elements than column headers.
Merge pull request #32 from Baachi/master

[Bugfix] The HttpSource ignores $context
Update README.md
Simplified non-strict mode logic.
Travis: test in PHP 5.5