Depreciated tag for functions

[crazywolf132]

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It would be good to have a depreciated tag we could append to functions, much like what JAVA has. Simply to let users know that a method is going to be replaced soon.

The system, when it finds the tag, it does the same as the internal tag, but instead of changing access rules... (allowing some, but not all functions from accessing it.) Will instead print out a message along the lines of The developer has marked this function as Depreciated, Function on line [number].

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One way we could do this is with a depreciated tag at the front of a method. Like so:

depreciated fn someFunction() {
say 'I am just a function';
}

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This might also be allowed to be coupled with the internal tag, but must come after it. Like so:

internal depreciated fn someFunction() {
say 'I am just a function';
}

[crazywolf132]

This is finished. Implemented exactly as above. #38 should refer to here for docs.