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

Fix bug: when the limit of 1000 log entries saved is reached, loading the file again didn't work properly and subsequent projects were not loaded anymore. This lead to 'lost projects' as reported in issue #62 and issue #70.

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

Only load the first 1000 entries. Since we don't store more than the last 1000 log entries, there won't be more than that anyway.
This fixes issue #38.

Reduce the log entries to 1000 *before* serializing the std::map.

Pass an encryption description: this is required on Win2k.
This fixes issue #21.

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.

en/decrypt the passwords when serializing them to disk.
This fixes issue #5.

Indicate the GPL license.

Use a memory mapped file for loading the url infos.