0.1.1

• Add support for Tabix index files:
  • Rename 'Track.bai_file' field to 'Track.index_file'
  • Validate that index file (.bai/.tbi) is used only when required
• Improve Genome Browser styling:
  • Add left/right margins to genome browser to allow for easier vertical scrolling
  • Align 'Info' button with genome browser buttons
  • Allow genome browser to expand to full height of window
  • Default to reverse-scrolling mode for trackpads
  • Collapse left margin on small screens