Use absolute paths for opening files where possible

Works around various 3rd party nasties that change the working directory and don't set it back properly.
Log message when using a non-default IP binding
Fix Broadcast Settings mode switching for rtl locales
Add StringList::Join utility
Refactor status bar output status handling
Separate Replay Buffer from normal file recording
Add date/time replacement for save path

Also OBS will now automatically create directories when needed
Add separate setting for Replay Buffer File Path
Add Record from Replay Buffer

This basically saves the current replay buffer and continues recording
to the saved file. The recording uses the standard file path.
Share memory between ReplayBuffer and RecordingHelper
Throttle RecordingHelper::AddPacket to keep buffer from filling RAM

For each incoming video packet two more video packets should be written
by the save thread to make sure that the buffer drains
Improve RecordingHelper::SaveThread shutdown behaviour

This gives unfinished recordings a bit more time to write the remaining
buffered packets before threads are (potentially) terminated
Update version to 0.63 test 3
Merge pull request #362 from Glought/SceneCollectionGlobalSourcesImport

Added "Import" button in Global Sources Dialog.
Restore missing Replay Buffer tooltip
Add warning when starting Replay Buffer without setting hotkeys
Improve Replay Buffer length error handling
Fix QSV Settings not being enabled with QSV selected
Update project files for VS 2013 Update 3
Copy/paste fix