Docs out of date

The Docs seem to be out of date.

There is not setTitle() function anymore and no export property to call as suggested in https://github.com/rgazelot/ExcelBundle/blob/master/USAGE.md#9-other-important-stuff

[rgazelot]

Indeed, I will try to fix it. Thanks.

[apatkinson]

bump on this please, most people are using composer now.

[rgazelot]

I suggest to you to use this new library ExcelAnt, https://github.com/Wisembly/ExcelAnt