Added the ability to parse properties files to common-cfg.
Fixed common-cfg's log-level setting and added a new validator.
Made the changes necessary to make anon-files work with .properties files.
saved-searches now works with .properties files.
Updated tree-urls to work with .properties files.
Moved user-preferences to .properties files.
Moved user-sessions over to .properties files.
Fixed the tree-urls unit tests.
Fixed the save-searches unit tests.
Fixed the user-preferences unit tests.
Fixed the user-sessions unit tests.
Merge branch 'dev' into 1.8.8