fixed binop for basic types. added test
at operator working on t@ case. tests added

test for normal unop added. previously missed
t%0@ not working
commenting out lrxdebug so tests succeed
corrected echo in readme
child access operators working on both sides of assign, except for case when both lhs and rhs are being %ed. at operator @ works on both side of assign. added test.
s%0 = t%0 is working EXCLAMATION POINT EXCLAMATION POINT EXCLAMATION POINT
assignment to null parts of trees cworking :) :) :)
fixed binop addition of integers in output; needed to dereference pointer b/c using child access and at
pulled all decls up to the top; for loops working again
added test 27
added test for char arithmetic
added test for tree literal to child assignment