Added submodule contents into tree

externals/mbedtls/visualc/VS2013/.gitignore

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+# Files that may be left over from check-generated-files.sh
+/*.bak
+
+# Visual Studio artifacts
+/.localhistory/
+/.vs/
+/Debug/
+/Release/
+/*.vcxproj.filters
+/*.vcxproj.user
+
+###START_GENERATED_FILES###
+# Files automatically generated by generate_visualc_files.pl
+/mbedTLS.sln
+/*.vcxproj
+###END_GENERATED_FILES###