Removed xltxtra, xunicode from LaTeX template.

Thanks Andrew Dunning.

Updated tests and changelog.

changelog

@@ -119,6 +119,7 @@ pandoc (1.15.1)
       options (Andrew Dunning).
     + LaTeX: Adjusted for changes to polyglossia-lang variable (mb21).
     + LaTeX: added `polyglossia-lang.name` and `.options` (#2437, mb21).
+    + LaTeX: removed xltxtra, xunicode from template (Andrew Dunning).
     + reveal.js:  add controls, progress variables (Grégoire Pineau).
     + man template (Alex Vong): Added comment stating that the page is
       autogenerated by pandoc, giving version.  Added `adjusting`

data/templates

@@ -1 +1 @@
-Subproject commit 0081fa9306e0fb4f923020596d23c642aac67945
+Subproject commit ff0db28a2c81dd086e75ff15a749a2fbb8405ad2

tests/lhs-test.latex

@@ -9,7 +9,6 @@
 \else % if luatex or xelatex
   \ifxetex
     \usepackage{mathspec}
-    \usepackage{xltxtra,xunicode}
   \else
     \usepackage{fontspec}
   \fi

tests/lhs-test.latex+lhs

@@ -9,7 +9,6 @@
 \else % if luatex or xelatex
   \ifxetex
     \usepackage{mathspec}
-    \usepackage{xltxtra,xunicode}
   \else
     \usepackage{fontspec}
   \fi

tests/writer.latex

@@ -9,7 +9,6 @@
 \else % if luatex or xelatex
   \ifxetex
     \usepackage{mathspec}
-    \usepackage{xltxtra,xunicode}
   \else
     \usepackage{fontspec}
   \fi