Add gitignore and gitattribute

.gitattribute

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+*.bytes eol=lf
+*.asset eol=lf
+*.shader eol=text
+*.unity eol=text
+*.cs eol=text
+*.meta eol=lf
+*.prefab eol=lf
+.gitattributes text
+.gitignore text

.gitignore

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+/[Ll]ibrary/
+/[Tt]emp/
+/[Oo]bj/
+/[Bb]uild/
+/[Bb]uilds/
+/Assets/AssetStoreTools*
+
+# Autogenerated VS/MD/Consulo solution and project files
+ExportedObj/
+.consulo/
+*.csproj
+*.unityproj
+*.sln
+*.suo
+*.tmp
+*.user
+*.userprefs
+*.pidb
+*.booproj
+*.svd
+
+
+# Unity3D generated meta files
+*.pidb.meta
+
+# Unity3D Generated File On Crash Reports
+sysinfo.txt
+
+# Builds
+*.apk
+*.unitypackage