added method to read from string

not completed but started to build the basics around it.
Function changed to class. Added readfromstring

Theres still a bug with multiple avg functions in a same function tree.
Previous upload was accidentaly old one. this is new + fix

reading from a string works now.
combining versions
Combine with GUI

added readFromString () to GUI
Change randomArt to RandomArt

Change randomArt to RandomArt
Rename randomArt.java to RandomArt.java
Merge remote-tracking branch 'origin/readFromString'

Conflicts:
	randomArt$1.class
	randomArt.class
	randomArt.ctxt