Added version history for changes since 1.0.1k.
Added version history for changes since 1.0.1k.

c9s/php-markdown,TypeFriendly/PHP-Markdown,mariokonrad/php-markdown,MWDelaney/bootstrap-3-shortcodes,MWDelaney/bootstrap-3-shortcodes,itafroma/php-markdown,alganet/ElephantMarkdown,nazar-pc/php-markdown-next,MWDelaney/bootstrap-3-shortcodes,filipstefansson/bootstrap-3-shortcodes,jockchou/php-markdown,queirozfcom/php-markdown-with-syntax-highlight,Kapeli/php-markdown,n054/php-markdown,drosenstark/php-markdown,filipstefansson/bootstrap-3-shortcodes,robbieaverill/php-markdown,ashur/php-markdown