rename LArray class to Array

[gdementen]

Pros:

• We are in the larray module, so the L of LArray is kinda redundant
• It would be one less character to type
• The L of LArray is a bit weird for arrays without labels (arrays with only wildcard axes)
• I like it :)

Cons:

• more deprecated warnings for existing users (though a single string replace could fix the problem)
• LGroup will look slightly odd (but having Group and IGroup would be worse). On the other hand, if we converge both kinds of groups to Group (like I discussed in a few issues) this would no longer be a con but a pro.

[alixdamman]

Why not. I always found weird to have a specific object with the same as the library.
But considering users hate syntax change and love stability I would to move this issue for milestone 0.32 or later.

[alixdamman]

In that case, I think we should also use Frame instead of LFrame for issue #81, right?

[gdementen]

In that case, I think we should also use Frame instead of LFrame for issue #81, right?

Sure