Support for 0.1.5 and various other stuff

[Falki-git]

• now supports 0.1.5 patch
• added years to time entries (1 year = 426 Kerbin days, 1 Kerbin day = 6 hours)
• changed OAB Stage Info entry header "SLT" (Sea Level TWR) to "ASL TWR" for clarity
• now possible to disable the keybind (CTRL + E) or to change it; look for the option in Settings -> Mods
• message subscriptions are now persistent, meaning Micro Engineer will continue to function through exiting to the main menu and loading a different campaign
• fixed Total ASL deltav in OAB Stage Info window not updating if different celestial bodies are selected