Deprecate isreadonly

[EpixScripts]

I believe if there is an official alternative to getting a table's readonly status with table.isfrozen, usage of a custom function for this should be discouraged.

[LuaOranges]

Deprecating this would create inconsistency in the api (i.e. readonly, freeze and frozen), maybe both setreadonly and isreadonly could be deprecated in favor for adding table.unfreeze or maybe table.thaw?

[ccuser44]

Deprecating this would create inconsistency in the api (i.e. readonly, freeze and frozen), maybe both setreadonly and isreadonly could be deprecated in favor for adding table.unfreeze or maybe table.thaw?

I think we should add table.unfreeze and deprecate isreadonly and setreadonly