advotracker: restructure project using crate tree

* advotracker: the framework crate
* crate/advotrackerdb: crate implementing the database backend
* crate/advotrackerd: the backend daemon
* crate/adovtracker: the application (CLI and GUI)

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

crates/advotrackerd/.gitignore

@@ -0,0 +1,10 @@
+# This file should only ignore things that are generated during a build,
+# generated by common IDEs, and optional files controlled by the user that
+# affect the build (such as config.toml).
+.#*
+.DS_Store
+**/*.rs.bk
+Cargo.lock
+**/*~
+/target/
+/config.toml