Made many documentation fixes, including an erroneous line in the
License text. This change did not affect the license terms.
Added ShowTrace configuration option to pse.conf to control display
of tracebacks on errors
You can no longer erroneously "outdent" to a negative indentation level
Single <? : ?> expressions no longer re-indent, only "outdent"
Prepending an equals symbol (=) to an attribute value of a custom tag
will cause the value to be treated as a python expression instead of
a string value
