Added a Unity based git ignore file.

.gitignore

+#############
+# Vim Files #
+#############
+*~
+*.swp
+
+
+###############
+# Unity Files #
+###############
+ProjectSource/[Ll]ibrary/
+ProjectSource/[Tt]emp/
+ProjectSource/[Oo]bj/
+ProjectSource/[Bb]uild/
+ProjectSource/[Bb]uilds/
+ProjectSource/Assets/AssetStoreTools*
+
+# Autogenerated VS/MD solution and project files
+ProjectSource/ExportedObj/
+ProjectSource/*.csproj
+ProjectSource/*.unityproj
+ProjectSource/*.sln
+ProjectSource/*.suo
+ProjectSource/*.tmp
+ProjectSource/*.user
+ProjectSource/*.userprefs
+ProjectSource/*.pidb
+ProjectSource/*.booproj
+ProjectSource/*.svd
+
+# Unity3D generated meta files
+*.pidb.meta
+
+# Unity3D Generated File On Crash Reports
+sysinfo.txt
+
+
+#############################
+# Randomly Generated Thumbs #
+#############################
+Thumbs.db.meta
+Thumbs.db
+
+
+########################
+# Visual Studio Folder #
+########################
+ProjectSource/.vs