[kramdown] switch to kramdown for markdown, sed ``` -> ~~~, partial api docs update
[kramdown] further api doc updates, fixed response/code highlights
code block formatting changes for kramdown
first pass of adding anchor links to all headers (v0.12 docs only)
v0.11 fixes for kramdown syntax highlighting
update README with reference to new markdown renderer
Merge pull request #97 from sensu/kramdown

Use Kramdown for markdown