commitmonitor Code

Implemented issue #106: "Ignore users" isn't considered when executing "Script/Command"

Implemented issue #94: Enhancement: URL for browsing differences with revisions numbers

* add edit box for the web viewer url to the url dialog
* replace the strings in the url:
%revision - replaced with the new selected revision number
%url - replaced with the url of the project
%project - replaced with the project name
* open the browser with the web viewer url when requested by the context menu

Implemented issue #7: Custom action after commit detection

* add edit box for the command line string to execute to the url dialog
* replace the strings in the command line:
%revision - replaced with the new HEAD revision number
%url - replaced with the url of the project
%project - replaced with the project name
* execute the command line string when new commits are detected

Implemented issue #92: Enhancement: Ignore list of users

Remove the option to automatically fetch the diff.

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.