commitmonitor Code

Create a backup of the urls file after a successful load.

This adds to issue #62: After PC system crash, CommitMonitor loses all repository settings and commit history

First save the info to a temp file. Only if saving succeeds, move the temp file to the real file.

Ignore own commits. This implements issue #4.
* add checkbox to the url dialog to enable the ignore-own-commits feature.
* add boolean param to the CUrlInfo class and serialize it properly.
* in the updating thread, check the log messages if they match the own author and ignore those if requested.

Indicate the GPL license.

Use a memory mapped file for loading the url infos.

Use buffered file read/write.

Implement using an svnrobots.txt file which can set certain rules to reduce 'hammering' a server:
* disallowautodiff : if set, then automatic diffs are not allowed
* checkinterval = XX : minimum interval in minutes between checks

Show an error message box when selecting a tree item, if there was an error the last time that url was accessed.

* save the last error
* add version info

* use a better, reentrant reader/write section class
* refresh the UI in a timer interval