added gif encoder class: https://github.com/nbadal/android-gif-encoder
Merge branch 'master' of https://github.com/holzleitner/GifMaker

# By Melkizedek (1) and Werner (1)
# Via Melkizedek
* 'master' of https://github.com/holzleitner/GifMaker:
  load Image
  progressbar advanced