Fix passing param $body.

$body must not be parsed
Change binding Plugin objects.

Before: bind Plugin object to IoC container
After: create Plugin object per call
Merge pull request #60 from toiee/fix-haik-markdown

Fix passing param $body.
Merge pull request #61 from toiee/change-plugin-manager

Change binding Plugin objects.
Resolv nest parsing.

When recursively call Parser::parse create new object of Parser and parse text
Merge pull request #62 from toiee/fix-parser

Resolv nest parsing.
Merge branch 'master' into create-cols-plugin