#247 Add concatenate methods to the Object class.

[Rick McGuire]

Some unexpected user errors can be eliminated by adding concatenate methods to the Object class. Consider the follow Say statements:

d = .datetime~new

say d -- displays the time stamp value
say date() d -- displays the normal date + timestamp
say d date() -- Error!

If object supported the 3 concatenate operators and performed the operation using the result from the string method, all objects instances can appear in this type of statement.

[Rick McGuire]

Logged In: YES
user_id=1125291
Originator: YES

Committed revision 837.

[Rick McGuire]

Logged In: YES
user_id=1125291
Originator: YES

Committed revision 841.