Update peg markdown highlight to latest version#304

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cloose wants to merge 2 commits intodevelopfrom feature/update-peg-markdown-highlight

+2,354-2,422

Commits on Jan 19, 2016

Update to latest peg-markdown-highlight master
cloose
committed

Commits on Mar 1, 2016

Fix compile of peg-markdown-highlight with C++
cloose
committed