Add greetings for PegDown and JetBrains
Add greetings for PegDown and JetBrains

vsch/idea-multimarkdown,i17c/idea-markdown,nicoulaj/idea-markdown,zouzhenglu/idea-markdown,vsch/idea-multimarkdown,vsch/idea-multimarkdown,reidwooten99/idea-markdown,vsch/idea-multimarkdown