Make repository name and module name consistent with ITK

[jhlegarreta]

Following the changes
InsightSoftwareConsortium/ITKIOMeshSTL#16
and
InsightSoftwareConsortium/ITKIOMeshSTL#19

the same consistency rules should be applied to this repository as well.

[jhlegarreta]

Pinging @thewtex for an opinion.

[thewtex]

👍 @jhlegarreta good idea. The name should be ITKIOFDF / IOFDF per:

https://itk.org/Insight/Doxygen/html/group__Group-IO.html

[jhlegarreta]

Will come with a PR.

[jhlegarreta]

BTW, not sure whether we can apply the same principle to:
https://github.com/scifio/scifio-imageio.git

[thewtex]

We may have to balance with the scifio naming conventions.

[jhlegarreta]

Sounds reasonable.