Add yaml frontmatter support to markdown

vimrc

@@ -131,7 +131,7 @@ let g:DoxygenToolkit_commentType = "C++"
 
 " markdown live browser preview
 Plug 'suan/vim-instant-markdown'
-let g:markdown_fenced_languages = ['cpp', 'c', 'cmake', 'sh', 'vim', 'python']
+let g:markdown_fenced_languages = ['cpp', 'c', 'cmake', 'sh', 'vim', 'python', 'yaml']
 
 " xterm-color-table.vim - view term and hex colors
 Plug 'guns/xterm-color-table.vim'
@@ -143,6 +143,7 @@ Plug 'tikhomirov/vim-glsl'
 Plug 'beyondmarc/hlsl.vim'
 Plug 'frasercrmck/opencl.vim'
 Plug 'asciidoc/vim-asciidoc'
+Plug 'mustache/vim-mustache-handlebars'
 
 if filereadable(expand('~/.vim/local.vim'))
   source ~/.vim/local.vim