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Reduced some asserts to > 0 since they can be called for face expansions and not only full expansion

stored in the first word of the actual data array (m_data) for the Array into its own
location.  See issue #91 for details.  The idea behind this change is to simplify the Array
class to make it more understandable and to potentially allow for better data alignment
and code vectorization.  This code has passed all the built in ctests.

by adjusting the parser as suggested by douglas

"old" means pre-parseutils cleanup, e.g. 0e69efe9

        old   before   now
""      0     1        0
","     0     2        0
",,"    0     3        0
"a"     1     1        1
",a"    0     2        0
"a,"    1     2        1
",a,"   0     3        0
"a,b"   2     3        2
"a, b," 2     3        2