Version 1.2.0

• Import annotations (details here).
• Open a new file while one is already open.
• Keyboard shortcuts (thanks @leonkunert). A future release will add instructions in the app itself, but for now:
  • Num Keys (1 - 9) : Change classes
  • Space Bar: Save and move to the next sentence
  • Right Arrow Key: Skip and move to the next sentence
  • Left Arrow Key: Go back to the previous sentence
  • Esc: Discard changes to the current sentence
• Lots and lots of bug fixes (full changelog).