commitmonitor Code

* get rid of the boost serialization (that one crashed and I couldn't figure out why), implement our own serialization instead.
* Implement timers and threads to fetch the log data and check for updates according to the settings.
* Implement username/password to pass to the repository if necessary.

* enable all controls in the url dialog
* don't check the url in the url dialog but do that later (not implemented yet) in the main dialog or even the check thread
* add load/save methods for our persistent data

Add class which holds the info about monitored urls.
Also implement loading/saving the data of the class by using the serialization of the boost library.