pidgin/pidgin

Create an AppImage for Pidgin3

2020-10-15, Gary Kramlich
9ce322b6f2d1
Create an AppImage for Pidgin3

Prepare for an eventual finch appimage

Testing Done:
Built the AppImage and verified it works by logging in with bonjour.

Reviewed at https://reviews.imfreedom.org/r/166/
For information on translating Pidgin, libpurple, and Finch, please see
our wiki page at https://developer.pidgin.im/wiki/TipsForTranslators