0.1.6

• converted a good portion of the library to Kotlin
• implemented Retrofit for better network/request handling
• finished much of the refactoring/groundwork for #22 and similar "service-independent" functionality
• added a fallback behavior for invalid auth tokens (#65)
• created avatar placeholders for contributors/translators (#63)
• prevent crashes when the app name/label is unspecified (#60)
• wrote a set of proguard rules to prevent issues with minifyEnabled (#66)

Migration notes:

Specifying the full package/class name of a wedge in the configuration file is now optional; <me.jfenn.attribouter.wedges.AppWedge> can be renamed to just <AppWedge>. Also, all occurrences of <LinkWedge> must be changed, as they have been moved out of their .link sub-package/folder/thing into the parent .wedges package with all the other wedge-like classes.