CPM updated (no new functionality, just refactoring)

.gitignore

cpm/misc/MeasureNestingDepth.curry

cpm/src/CPM/Config.curry

cpm/src/CPM/Main.curry

cpm/src/CPM/PackageCache/Global.curry

cpm/src/CPM/Repository/CacheDB.curry

cpm/src/CPM/Repository/Update.curry

cpm/vendor/cass/src/CASS/PackageConfig.curry

cpm/vendor/currypath/package.json

cpm/vendor/currypath/src/System/CurryPath.curry

cpm/vendor/flatcurry/LICENSE

cpm/vendor/flatcurry/package.json

cpm/vendor/frontend-exec/package.json

cpm/vendor/frontend-exec/src/System/FrontendExec.curry

cpm/vendor/xml/src/XmlConv.curry

download_tools.sh

optimize/.cpm/packages/cass/src/CASS/PackageConfig.curry

optimize/.cpm/packages/currypath/package.json

optimize/.cpm/packages/currypath/src/System/CurryPath.curry

optimize/.cpm/packages/distribution/LICENSE