It looks like the Gregs Lighting is the source of the problem -
Code:
2013-11-28 23:35:40 [SEVERE] [ForgeModLoader] Caught exception from GregsLighting
java.lang.NoClassDefFoundError: net/minecraft/util/ResourceLocation
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetPublicMethods(Unknown Source)
TBH, I've never really seen the point in the mod- especially now with Extra Utilities Chandeliers. You can try disabling the mod, and see if all loads. If not (or you want to keep the mod), try forcing an update through the options menu.