New Plotting Functions: findall.m and allchild.m

[Bill Denney]

Hello,

Attached are two new functions, findall.m and allchild.m.

Also, I was trying to write hgsave and hgload, but I could not find a 
way to create a handle without using the plotting functions.  Is there a 
way to generate handle objects without going through the plotting functions?

Have a good day,

Bill
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