BitMe v3.4

• Increased bitrate limits to suit modern bitrates.
  Refined slider page sizes to make scrolling easier.
  Many thanks, @FranceBB. #1
• Increased size of bitrate labels to fit the bigger numbers, and realigned them.
• Changed maximum time label from seconds to hours.
• Added OGV overhead.
• Improved MXF overhead a bit.
• Fixed building failure with spaces in the project path.
• Removed legacy project files, and reorganised source code.