Add LuaScriptInstance class. 

git-svn-id: http://urho3d.googlecode.com/svn/trunk@2536 3bd170d8-ddcf-f82c-f583-7a401ccf5608
Port Animating Scene to lua, test for LuaScriptInstance class.

git-svn-id: http://urho3d.googlecode.com/svn/trunk@2537 3bd170d8-ddcf-f82c-f583-7a401ccf5608
Replace table with spaces.

git-svn-id: http://urho3d.googlecode.com/svn/trunk@2538 3bd170d8-ddcf-f82c-f583-7a401ccf5608