commitmonitor Code

Use ShowNotification() instead of ShowMessageEx().
This adds to issue #189.

(Closes issue #189) : Snarl notification
* register CM with snarl
* register three different notification classes

Since r443 was reverted in r456, fix it again.

- Reverted revision 443: With this fix no new repositories will be found by CommitMonitor in a directory structured svn repository (multiple repos).

(Closes issue #2) : Add export/import conf file support
* add class to encrypt sensitive data in the exported file
* add class for ini files
* add new dialog to enter a password for encryption
* add exporting/importing functions to the CUrlInfos class

(Closes issue #185) : mark all as read action

(Closes issue #152) : Use Snarl popups
* include the snarl API
* use snarl to show a popup if it is running, otherwise still use the CommitMonitor popup as usual
* include the png resource in the installer for snarl to use

(Closes issue #183) : Monitored project changes to a folder with several subdirectories
* use the last checked revision as an additional check

(Closes issue #161)
* add option for showing the context menu on a left click on the tray icon so the user can disable this.

Show the tray menu for left clicks too.