Add option to specify name of entries in collection

What is the issue?
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An example would be where you have a "Documentation" matrix, and would like to refer to the entries as "Articles". This would largely simply dictate the value of the **create** button's text:

`Create Article` vs. `Create Documentation`

What versions of software are you using?
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**FusionCMS:** v6.0.0 Beta 0
