Added extensive support for legacy encoding scheme

Lots of images were pure Unicode garbage when received. This update will fix these issues since support for legacy encoding schemes has been added. 

Looking up the Unicodes was a task for quite some hours, sources are esp. iemoji.com and emojipedia.org.

IMPORTANT:
Also, three comments were added to show that there are missing image files. Gonna fix ASAP (this depends on the gemoji project).