Revert "CM11 Themes: Store hash codes for target and overlay in idmap"

This reverts commit 368dc02f32a72961b1c35bca1ce8d0854ba32352.
Revert "New Theme Engine [2/6] CM11 Themes"

This reverts commit ad12007d8d9250aaad4f17e3b8705f48f297acd5.
Revert "Runtime resource overlay, iteration 2"

This reverts commit bdabd0da4ff4f5b8b8082042bf4add0497d8d244.
Revert "New command line tool 'idmap'"

This reverts commit dd0a362b28fd74ccca2e26e455f158c392468ea6.