OBS 0.63b test 2

Changes:

• Add a replay buffer feature that allows you to save video files of the last [x] number of seconds (Palana)
• Add option in uninstaller to remove all saved settings and plugins (R1CH)
• Remove justin.tv references (R1CH)
• Fix potential crash with D3D8 capture (R1CH)
• Improve game capture hooking (R1CH)
• Preserve game capture target even if it isn't running (R1CH)
• Fix a crash in audio settings if no devices are present (R1CH)
• Fix a crash if removing global sources with no scenes (R1CH)
• Fix issues with some unicode characters not displaying correctly (Jim)
• Streamline hotkey handling by adding a dedicated hotkey panel in settings (Palana)
• Make a number of improvements to quicksync encoder (Palana)
• Fix bug where the log menu wouldn't display things correctly (Palana)
• Fix other various random minor bugs and potential issues (R1CH)
• Check for XInput support in the installer (R1CH)
• Remove help file, replace with online help which is more up-to-date (jack0r)
• Move "show log window" to help menu (jack0r)
• Fix keyboard tab order of all controls in the properties/settings windows (jack0r)