Added .gitignore file and GDD

.gitignore

@@ -0,0 +1,25 @@
+[Ll]ibrary/
+[Tt]emp/
+[Oo]bj/
+[Bb]uild/
+
+# Autogenerated VS/MD solution and project files
+*.csproj
+*.unityproj
+*.sln
+*.suo
+*.tmp
+*.user
+*.userprefs
+*.pidb
+*.booproj
+
+#Blender backup files
+*.blend1
+*.blend2
+
+# Unity3D generated meta files
+*.pidb.meta
+
+# Unity3D Generated File On Crash Reports
+sysinfo.txt