Changed BlankLine parser so it doesn't return a semantic value by default (and thus doesn't allocate memory by default).  Significant reduction in memory leakage!
Changed BlankLine parser so it doesn't return a semantic value by default
(and thus doesn't allocate memory by default).  Significant reduction
in memory leakage!

Also added __DEBUG__ flag to turn on memory allocation debugging statements.

Properly allocate element memory in HorizontalRule parser.

sftrabbit/MarkdownParse,sftrabbit/MarkdownParse,sftrabbit/MarkdownParse