Update L2U table, add emojis

Emoji support is far from perfect

Author: carlobaldassi

autoload/generate_latex_symbols_table.jl

@@ -10,7 +10,7 @@ open("$filename.vim","w") do f
     println(f, "function! $filename#$funcname()\n",
                "  return {\n",
                "    \\ ",
-               join([string("'", latex, "': '", unicode, "'") for (latex,unicode) in sort!(collect(Base.REPLCompletions.latex_symbols), by=x->x[2])],
+               join([string("'", latex, "': '", unicode, "'") for (latex,unicode) in sort!(vcat(collect(Base.REPLCompletions.latex_symbols),collect(Base.REPLCompletions.emoji_symbols)), by=x->x[2])],
                     ",\n    \\ "),
                "}")
     println(f, "endfunction")