Release 1.5.0

• If the lookup table shows related words, “Escape” shows the
  original lookup table
• Use itb_nltk.py to find related words (synonyms, hypernyms, and hyponyms)
• Add a module to find related words using NLTK
• Add a feature to find similar emoji
• Add predictions for emoji (optional, on by default)
• Add a module to match emoji using Unicode, CLDR, and emojione data
• Make typing-booster.appdata.xml translatable
• When ignoring key release events, “False” should be returned, not “True”
• Resolves: rhbz#1365497
• Make typing smoother by updating the candidates using GLib.idle_add()
• Make it possible to enter a space into the preëdit by
  typing “G- ” (AltGr+Space)