Nagstamon 1.0rc1

• added custom event notification with custom commands
• added highlighting of new events
• added storage of passwords in OS keyring
• added optional tooltip for full status information
• added support for applying custom actions to specific monitor only
• added copy buttons for servers and actions dialogs
• added stopping notification if event already vanished
• added support for Op5Monitor 6.3 instead of Ninja
• added experimental Zabbix support
• fixed old regression not-staying-on-top-bug
• fixed Check_MK-Recheck-DOS-bug
• fixed pop window size calculation on multiple screens
• fixed following popup window on multiple screens
• fixed hiding dialogs in MacOSX
• fixed ugly statusbar font in MacOSX
• fixed use of changed colors
• fixed non-ascending default sort order
• fixed Opsview downtime dialog
• fixed sometimes not working context menu
• various Check_MK improvements