Merge pull request #1562 from 153957/patch-1

Ignore files created by `\tikzexternalize`



When using TikZ & PGF with:
\usepackage{tikz} \usetikzlibrary{external} \tikzexternalize
It creates .dpth and .md5 files for the externalized tikzpictures.

See these pages in section 50 Externalization Library:
p.617 - 50.4.1 Support for Labels and References In External Files
p.621 - /tikz/external/up to date check
In the PGF manual:
http://mirrors.ctan.org/graphics/pgf/base/doc/pgfmanual.pdf

TeX.gitignore

@@ -120,6 +120,10 @@ _minted*
 *.sympy
 sympy-plots-for-*.tex/
 
+# TikZ & PGF
+*.dpth
+*.md5
+
 # todonotes
 *.tdo