[docs improvement] unknown idea of "class" in the description

[fistach]

On the page "Write Gauge specifications" there is a sentence:

"Data (Objects) can be shared in steps defined in different classes at runtime using DataStores exposed by Gauge."

but there is no such thing as a "class" in gauge. Please use some gauge idea here to be more specific.

Thank you.

[sriv]

This refers to the "class" in the step implementation, DataStores are "under the hood" implementation detail only visible to the implementation in a programming language. Hope that clarifies the intent - feel free to suggest a better language (or even send a pull request that explains this better).