Summary
- moved generalized lemmas
- generalized
- split off Homotopy.thy
- split off Convex.thy: material that does not require Topology_Euclidean_Space
- moved setdist to more appropriate places
- reduced dependencies of Connected.thy
- split off theory combining Elementary_Topology and Abstract_Topology
- moved material from Connected.thy to more appropriate places
- generalized
- moved material from Connected.thy to more appropriate places
- generalized