made htmlplugin.rb ruby 1.9 compatible
fixed a bug in BlockParser#add_verbatim_block that doesn't throw away a VERBATIM_END line
changed the timing of parsing inline elements in ParagraphNode, and now parses multiple leafs at one time
introduced NonNestedBlockLeaf and NonNestedBlockNode
implemented QuoteNode#parse_leafs
tidy up BlockLeaf.create and NonNestedBlockNode#parse_leafs
moved the main part of NonNestedBlockNode#parse_leafs to BlockLeaf#parse_leafs
Merge branch 'develop' into 2html

Quote and Verbatim could be rendered properly now.