de-applying
relaxed assumptions for dim_image_eq and dim_image_le
default value for parametricity of dim
isabelle update_comments;
tuned headers;
move FuncSet back to HOL-Library (amending 493b818e8e10) --HG-- rename : src/HOL/FuncSet.thy => src/HOL/Library/FuncSet.thy
fixed HOL-Analysis
added Johannes' generalizations Modules.thy and Vector_Spaces.thy; adapted HOL and HOL-Analysis accordingly --HG-- rename : src/HOL/Library/FuncSet.thy => src/HOL/FuncSet.thy