Update packages/ Add org-ref

elpa/pdf-tools-20180428.827/build/server/.gitignore

@@ -0,0 +1,25 @@
+*.o
+.deps/
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache/
+config.h
+config.h.in
+config.log
+config.status
+configure
+depcomp
+epdfinfo
+install-sh
+libsynctex.a
+missing
+stamp-h1
+ar-lib
+compile
+config.h.in~
+.clang_complete
+callgrind.out.*
+config.guess
+config.sub
+TAGS